diff --git a/desktop_version/CONTRIBUTORS.txt b/desktop_version/CONTRIBUTORS.txt
index e61cc849..194d015d 100644
--- a/desktop_version/CONTRIBUTORS.txt
+++ b/desktop_version/CONTRIBUTORS.txt
@@ -14,6 +14,7 @@ Contributors
 * Elijah Stone (@moon-chilled)
 * Elliott Saltar (@eboyblue3)
 * Emmanuel Vadot (@evadot)
+* fraZ0R (@f-raZ0R)
 * Fredrik Ljungdahl (@FredrIQ)
 * Jules de Sartiges (@strikersh)
 * Keith Stellyes (@keithstellyes)
diff --git a/desktop_version/src/Alloc.h b/desktop_version/src/Alloc.h
new file mode 100644
index 00000000..042cffb4
--- /dev/null
+++ b/desktop_version/src/Alloc.h
@@ -0,0 +1,19 @@
+#ifndef ALLOCGAME_H
+#define ALLOCGAME_H
+
+/* TODO: VVV_malloc, VVV_realloc, etc. */
+
+#define VVV_freefunc(func, obj) \
+    do \
+    { \
+        if (obj != NULL) \
+        { \
+            func(obj); \
+            obj = NULL; \
+        } \
+    } \
+    while (0)
+
+#define VVV_free(obj) VVV_freefunc(SDL_free, obj)
+
+#endif /* ALLOCGAME_H */
diff --git a/desktop_version/src/BinaryBlob.cpp b/desktop_version/src/BinaryBlob.cpp
index 78a68814..62d99f19 100644
--- a/desktop_version/src/BinaryBlob.cpp
+++ b/desktop_version/src/BinaryBlob.cpp
@@ -5,6 +5,7 @@
 #include <stdio.h>
 #endif
 
+#include "Alloc.h"
 #include "Exit.h"
 #include "FileSystemUtils.h"
 #include "UtilityClass.h"
@@ -91,7 +92,7 @@ void binaryBlob::clear(void)
     {
         if (m_memblocks[i] != NULL)
         {
-            SDL_free(m_memblocks[i]);
+            VVV_free(m_memblocks[i]);
         }
     }
     SDL_zeroa(m_memblocks);
diff --git a/desktop_version/src/CWrappers.cpp b/desktop_version/src/CWrappers.cpp
index 57ff38c0..32ee9c6a 100644
--- a/desktop_version/src/CWrappers.cpp
+++ b/desktop_version/src/CWrappers.cpp
@@ -5,7 +5,7 @@
 extern "C" char* HELP_number_words(int _t)
 {
     /* C wrapper for UtilityClass::number_words.
-     * Caller must SDL_free. */
+     * Caller must VVV_free. */
 
     std::string str = help.number_words(_t);
 
diff --git a/desktop_version/src/Credits.h b/desktop_version/src/Credits.h
index 01884d95..f81631ac 100644
--- a/desktop_version/src/Credits.h
+++ b/desktop_version/src/Credits.h
@@ -96,6 +96,7 @@ static const char* githubfriends[] = {
     "Elijah Stone",
     "Elliott Saltar",
     "Emmanuel Vadot",
+    "fraZ0R",
     "Fredrik Ljungdahl",
     "Keith Stellyes",
     "KyoZM",
diff --git a/desktop_version/src/CustomLevels.cpp b/desktop_version/src/CustomLevels.cpp
index 21742fdf..ff03132c 100644
--- a/desktop_version/src/CustomLevels.cpp
+++ b/desktop_version/src/CustomLevels.cpp
@@ -9,6 +9,7 @@
 #include <tinyxml2.h>
 #include <utf8/unchecked.h>
 
+#include "Alloc.h"
 #include "Constants.h"
 #include "Editor.h"
 #include "Enums.h"
@@ -267,7 +268,7 @@ bool customlevelclass::getLevelMetaDataAndPlaytestArgs(const std::string& _path,
 
     std::string buf((char*) uMem);
 
-    FILESYSTEM_freeMemory(&uMem);
+    VVV_free(uMem);
 
     if (find_metadata(buf) == "")
     {
@@ -1483,116 +1484,92 @@ bool customlevelclass::save(const std::string& _path)
 
 void customlevelclass::generatecustomminimap(void)
 {
-    map.customwidth=mapwidth;
-    map.customheight=mapheight;
-
-    map.customzoom=1;
-    if(map.customwidth<=10 && map.customheight<=10) map.customzoom=2;
-    if(map.customwidth<=5 && map.customheight<=5) map.customzoom=4;
-
-    //Set minimap offsets
-    if(map.customzoom==4)
+    map.customzoom = 1;
+    if (mapwidth <= 10 && mapheight <= 10)
     {
-        map.custommmxoff=24*(5-map.customwidth);
-        map.custommmxsize=240-(map.custommmxoff*2);
-
-        map.custommmyoff=18*(5-map.customheight);
-        map.custommmysize=180-(map.custommmyoff*2);
+        map.customzoom = 2;
     }
-    else if(map.customzoom==2)
+    if (mapwidth <= 5 && mapheight <= 5)
     {
-        map.custommmxoff=12*(10-map.customwidth);
-        map.custommmxsize=240-(map.custommmxoff*2);
-
-        map.custommmyoff=9*(10-map.customheight);
-        map.custommmysize=180-(map.custommmyoff*2);
+        map.customzoom = 4;
     }
-    else
+
+    // Set minimap offsets
+    switch (map.customzoom)
     {
-        map.custommmxoff=6*(20-map.customwidth);
-        map.custommmxsize=240-(map.custommmxoff*2);
-
-        map.custommmyoff=int(4.5*(20-map.customheight));
-        map.custommmysize=180-(map.custommmyoff*2);
+    case 4:
+        map.custommmxoff = 24 * (5 - mapwidth);
+        map.custommmyoff = 18 * (5 - mapheight);
+        break;
+    case 2:
+        map.custommmxoff = 12 * (10 - mapwidth);
+        map.custommmyoff = 9 * (10 - mapheight);
+        break;
+    default:
+        map.custommmxoff = 6 * (20 - mapwidth);
+        map.custommmyoff = int(4.5 * (20 - mapheight));
+        break;
     }
 
+    map.custommmxsize = 240 - (map.custommmxoff * 2);
+    map.custommmysize = 180 - (map.custommmyoff * 2);
+
     FillRect(graphics.images[12], graphics.getRGB(0, 0, 0));
 
-    int tm=0;
-    int temp=0;
-    //Scan over the map size
-    if(mapheight<=5 && mapwidth<=5)
+    // Scan over the map size
+    for (int j2 = 0; j2 < mapheight; j2++)
     {
-        //4x map
-        for(int j2=0; j2<mapheight; j2++)
+        for (int i2 = 0; i2 < mapwidth; i2++)
         {
-            for(int i2=0; i2<mapwidth; i2++)
+            int tm;
+            if (getroomprop(i2, j2)->tileset == 1)
             {
-                //Ok, now scan over each square
-                tm=196;
-                if(getroomprop(i2, j2)->tileset==1) tm=96;
-
-                for(int j=0; j<36; j++)
-                {
-                    for(int i=0; i<48; i++)
-                    {
-                        temp=absfree(int(i*0.83) + (i2*40),int(j*0.83)+(j2*30));
-                        if(temp>=1)
-                        {
-                            //Fill in this pixel
-                            FillRect(graphics.images[12], (i2*48)+i, (j2*36)+j, 1, 1, graphics.getRGB(tm, tm, tm));
-                        }
-                    }
-                }
+                tm = 96;
             }
-        }
-    }
-    else if(mapheight<=10 && mapwidth<=10)
-    {
-        //2x map
-        for(int j2=0; j2<mapheight; j2++)
-        {
-            for(int i2=0; i2<mapwidth; i2++)
+            else
             {
-                //Ok, now scan over each square
-                tm=196;
-                if(getroomprop(i2, j2)->tileset==1) tm=96;
-
-                for(int j=0; j<18; j++)
-                {
-                    for(int i=0; i<24; i++)
-                    {
-                        temp=absfree(int(i*1.6) + (i2*40),int(j*1.6)+(j2*30));
-                        if(temp>=1)
-                        {
-                            //Fill in this pixel
-                            FillRect(graphics.images[12], (i2*24)+i, (j2*18)+j, 1, 1, graphics.getRGB(tm, tm, tm));
-                        }
-                    }
-                }
+                tm = 196;
             }
-        }
-    }
-    else
-    {
-        for(int j2=0; j2<mapheight; j2++)
-        {
-            for(int i2=0; i2<mapwidth; i2++)
-            {
-                //Ok, now scan over each square
-                tm=196;
-                if(getroomprop(i2, j2)->tileset==1) tm=96;
 
-                for(int j=0; j<9; j++)
+            // Ok, now scan over each square
+            for (int j = 0; j < 9 * map.customzoom; j++)
+            {
+                for (int i = 0; i < 12 * map.customzoom; i++)
                 {
-                    for(int i=0; i<12; i++)
+                    int tile;
+                    switch (map.customzoom)
                     {
-                        temp=absfree(3+(i*3) + (i2*40),(j*3)+(j2*30));
-                        if(temp>=1)
-                        {
-                            //Fill in this pixel
-                            FillRect(graphics.images[12], (i2*12)+i, (j2*9)+j, 1, 1, graphics.getRGB(tm, tm, tm));
-                        }
+                    case 4:
+                        tile = absfree(
+                            int(i * 0.83) + (i2 * 40),
+                            int(j * 0.83) + (j2 * 30)
+                        );
+                        break;
+                    case 2:
+                        tile = absfree(
+                            int(i * 1.6) + (i2 * 40),
+                            int(j * 1.6) + (j2 * 30)
+                        );
+                        break;
+                    default:
+                        tile = absfree(
+                            3 + (i * 3) + (i2 * 40),
+                            (j * 3) + (j2 * 30)
+                        );
+                        break;
+                    }
+
+                    if (tile >= 1)
+                    {
+                        // Fill in this pixel
+                        FillRect(
+                            graphics.images[12],
+                            (i2 * 12 * map.customzoom) + i,
+                            (j2 * 9 * map.customzoom) + j,
+                            1,
+                            1,
+                            graphics.getRGB(tm, tm, tm)
+                        );
                     }
                 }
             }
diff --git a/desktop_version/src/FileSystemUtils.cpp b/desktop_version/src/FileSystemUtils.cpp
index 72dc8069..d9402882 100644
--- a/desktop_version/src/FileSystemUtils.cpp
+++ b/desktop_version/src/FileSystemUtils.cpp
@@ -4,6 +4,7 @@
 #include <stdio.h>
 #include <tinyxml2.h>
 
+#include "Alloc.h"
 #include "BinaryBlob.h"
 #include "Exit.h"
 #include "Graphics.h"
@@ -201,13 +202,8 @@ void FILESYSTEM_deinit(void)
     {
         PHYSFS_deinit();
     }
-    if (stdin_buffer != NULL)
-    {
-        SDL_free(stdin_buffer);
-        stdin_buffer = NULL;
-    }
-    SDL_free(basePath);
-    basePath = NULL;
+    VVV_free(stdin_buffer);
+    VVV_free(basePath);
     isInit = false;
 }
 
@@ -505,8 +501,6 @@ bool FILESYSTEM_isAssetMounted(const char* filename)
     return SDL_strcmp(assetDir, realDir) == 0;
 }
 
-void FILESYSTEM_freeMemory(unsigned char **mem);
-
 static void load_stdin(void)
 {
     size_t pos = 0;
@@ -636,7 +630,7 @@ void FILESYSTEM_loadFileToMemory(
     success = PHYSFS_readBytes(handle, *mem, length);
     if (success == -1)
     {
-        FILESYSTEM_freeMemory(mem);
+        VVV_free(*mem);
     }
     PHYSFS_close(handle);
     return;
@@ -665,12 +659,6 @@ void FILESYSTEM_loadAssetToMemory(
     FILESYSTEM_loadFileToMemory(path, mem, len, addnull);
 }
 
-void FILESYSTEM_freeMemory(unsigned char **mem)
-{
-    SDL_free(*mem);
-    *mem = NULL;
-}
-
 bool FILESYSTEM_loadBinaryBlob(binaryBlob* blob, const char* filename)
 {
     PHYSFS_sint64 size;
@@ -817,7 +805,7 @@ bool FILESYSTEM_loadTiXml2Document(const char *name, tinyxml2::XMLDocument& doc)
         return false;
     }
     doc.Parse((const char*) mem);
-    FILESYSTEM_freeMemory(&mem);
+    VVV_free(mem);
     return true;
 }
 
diff --git a/desktop_version/src/FileSystemUtils.h b/desktop_version/src/FileSystemUtils.h
index bac5b444..7358673b 100644
--- a/desktop_version/src/FileSystemUtils.h
+++ b/desktop_version/src/FileSystemUtils.h
@@ -32,7 +32,6 @@ void FILESYSTEM_loadAssetToMemory(
     size_t* len,
     const bool addnull
 );
-void FILESYSTEM_freeMemory(unsigned char **mem);
 
 bool FILESYSTEM_loadBinaryBlob(binaryBlob* blob, const char* filename);
 
diff --git a/desktop_version/src/Graphics.cpp b/desktop_version/src/Graphics.cpp
index c340d8c6..8bf44e0c 100644
--- a/desktop_version/src/Graphics.cpp
+++ b/desktop_version/src/Graphics.cpp
@@ -4,6 +4,7 @@
 #include <SDL.h>
 #include <utf8/unchecked.h>
 
+#include "Alloc.h"
 #include "Constants.h"
 #include "CustomLevels.h"
 #include "Entity.h"
@@ -158,7 +159,7 @@ void Graphics::destroy(void)
     #define CLEAR_ARRAY(name) \
         for (size_t i = 0; i < name.size(); i += 1) \
         { \
-            SDL_FreeSurface(name[i]); \
+            VVV_freefunc(SDL_FreeSurface, name[i]); \
         } \
         name.clear();
 
@@ -228,22 +229,20 @@ void Graphics::create_buffers(const SDL_PixelFormat* fmt)
 
 void Graphics::destroy_buffers(void)
 {
-#define FREE_SURFACE(SURFACE) \
-    SDL_FreeSurface(SURFACE); \
-    SURFACE = NULL;
+#define FREE_SURFACE(SURFACE) VVV_freefunc(SDL_FreeSurface, SURFACE)
 
-    FREE_SURFACE(backBuffer)
-    FREE_SURFACE(footerbuffer)
-    FREE_SURFACE(ghostbuffer)
-    FREE_SURFACE(foregroundBuffer)
-    FREE_SURFACE(menubuffer)
-    FREE_SURFACE(warpbuffer)
-    FREE_SURFACE(warpbuffer_lerp)
-    FREE_SURFACE(towerbg.buffer)
-    FREE_SURFACE(towerbg.buffer_lerp)
-    FREE_SURFACE(titlebg.buffer)
-    FREE_SURFACE(titlebg.buffer_lerp)
-    FREE_SURFACE(tempBuffer)
+    FREE_SURFACE(backBuffer);
+    FREE_SURFACE(footerbuffer);
+    FREE_SURFACE(ghostbuffer);
+    FREE_SURFACE(foregroundBuffer);
+    FREE_SURFACE(menubuffer);
+    FREE_SURFACE(warpbuffer);
+    FREE_SURFACE(warpbuffer_lerp);
+    FREE_SURFACE(towerbg.buffer);
+    FREE_SURFACE(towerbg.buffer_lerp);
+    FREE_SURFACE(titlebg.buffer);
+    FREE_SURFACE(titlebg.buffer_lerp);
+    FREE_SURFACE(tempBuffer);
 
 #undef FREE_SURFACE
 }
@@ -347,8 +346,7 @@ void Graphics::updatetitlecolours(void)
             } \
         } \
         \
-        SDL_FreeSurface(grphx.im_##tilesheet); \
-        grphx.im_##tilesheet = NULL; \
+        VVV_freefunc(SDL_FreeSurface, grphx.im_##tilesheet); \
     }
 
 #define PROCESS_TILESHEET(tilesheet, tile_square, extra_code) \
@@ -376,7 +374,7 @@ bool Graphics::Makebfont(void)
             font_positions[codepoint] = pos;
             ++pos;
         }
-        FILESYSTEM_freeMemory(&charmap);
+        VVV_free(charmap);
     }
     else
     {
@@ -502,7 +500,7 @@ static void print_char(
 
     if (scale > 1)
     {
-        SDL_FreeSurface(surface);
+        VVV_freefunc(SDL_FreeSurface, surface);
     }
 }
 
@@ -2179,7 +2177,7 @@ void Graphics::drawentity(const int i, const int yoff)
         setRect(drawRect, xp, yp - yoff, sprites_rect.x * 6, sprites_rect.y * 6);
         SDL_Surface* TempSurface = ScaleSurface( spritesvec[obj.entities[i].drawframe], 6 * sprites_rect.w,6* sprites_rect.h );
         BlitSurfaceColoured(TempSurface, NULL , backBuffer,  &drawRect, ct );
-        SDL_FreeSurface(TempSurface);
+        VVV_freefunc(SDL_FreeSurface, TempSurface);
 
 
 
diff --git a/desktop_version/src/GraphicsResources.cpp b/desktop_version/src/GraphicsResources.cpp
index 743f9f39..4d742bd5 100644
--- a/desktop_version/src/GraphicsResources.cpp
+++ b/desktop_version/src/GraphicsResources.cpp
@@ -1,5 +1,6 @@
 #include "GraphicsResources.h"
 
+#include "Alloc.h"
 #include "FileSystemUtils.h"
 #include "Vlogging.h"
 
@@ -37,7 +38,7 @@ SDL_Surface* LoadImage(const char *filename)
         return NULL;
     }
     error = lodepng_decode32(&data, &width, &height, fileIn, length);
-    FILESYSTEM_freeMemory(&fileIn);
+    VVV_free(fileIn);
 
     if (error != 0)
     {
@@ -61,14 +62,14 @@ SDL_Surface* LoadImage(const char *filename)
             SDL_PIXELFORMAT_ARGB8888,
             0
         );
-        SDL_FreeSurface( loadedImage );
-        SDL_free(data);
+        VVV_freefunc(SDL_FreeSurface, loadedImage);
+        VVV_free(data);
         SDL_SetSurfaceBlendMode(optimizedImage, SDL_BLENDMODE_BLEND);
         return optimizedImage;
     }
     else
     {
-        SDL_free(data);
+        VVV_free(data);
         vlog_error("Image not found: %s", filename);
         SDL_assert(0 && "Image not found! See stderr.");
         return NULL;
@@ -104,10 +105,7 @@ void GraphicsResources::init(void)
 
 void GraphicsResources::destroy(void)
 {
-#define CLEAR(img) \
-    SDL_FreeSurface(img); \
-    img = NULL;
-
+#define CLEAR(img) VVV_freefunc(SDL_FreeSurface, img)
     CLEAR(im_tiles);
     CLEAR(im_tiles2);
     CLEAR(im_tiles3);
diff --git a/desktop_version/src/GraphicsUtil.cpp b/desktop_version/src/GraphicsUtil.cpp
index 9c86a4ec..54698116 100644
--- a/desktop_version/src/GraphicsUtil.cpp
+++ b/desktop_version/src/GraphicsUtil.cpp
@@ -4,6 +4,7 @@
 #include <stddef.h>
 #include <stdlib.h>
 
+#include "Alloc.h"
 #include "Graphics.h"
 #include "Maths.h"
 
@@ -226,7 +227,7 @@ void BlitSurfaceColoured(
     }
 
     SDL_BlitSurface(tempsurface, _srcRect, _dest, tempRect);
-    SDL_FreeSurface(tempsurface);
+    VVV_freefunc(SDL_FreeSurface, tempsurface);
 }
 
 void BlitSurfaceTinted(
@@ -287,7 +288,7 @@ void BlitSurfaceTinted(
     }
 
     SDL_BlitSurface(tempsurface, _srcRect, _dest, tempRect);
-    SDL_FreeSurface(tempsurface);
+    VVV_freefunc(SDL_FreeSurface, tempsurface);
 }
 
 
@@ -489,7 +490,7 @@ void ScrollSurface( SDL_Surface* _src, int _pX, int _pY )
     //Cleanup temp surface
     if (part1)
     {
-        SDL_FreeSurface(part1);
+        VVV_freefunc(SDL_FreeSurface, part1);
     }
 
 }
diff --git a/desktop_version/src/Input.cpp b/desktop_version/src/Input.cpp
index b1842ccd..1d3da34a 100644
--- a/desktop_version/src/Input.cpp
+++ b/desktop_version/src/Input.cpp
@@ -2379,6 +2379,10 @@ void gameinput(void)
     {
         //Do nothing if we're in a Time Trial but a fade animation is playing
     }
+    else if (map.custommode && !map.custommodeforreal)
+    {
+        // We're playtesting in the editor so don't do anything
+    }
     else
     {
         //Normal map screen, do transition later
diff --git a/desktop_version/src/KeyPoll.cpp b/desktop_version/src/KeyPoll.cpp
index cd777849..91bc82cd 100644
--- a/desktop_version/src/KeyPoll.cpp
+++ b/desktop_version/src/KeyPoll.cpp
@@ -4,6 +4,7 @@
 #include <string.h>
 #include <utf8/unchecked.h>
 
+#include "Alloc.h"
 #include "Exit.h"
 #include "Game.h"
 #include "GlitchrunnerMode.h"
@@ -183,7 +184,7 @@ void KeyPoll::Poll(void)
                     if (text != NULL)
                     {
                         keybuffer += text;
-                        SDL_free(text);
+                        VVV_free(text);
                     }
                 }
             }
diff --git a/desktop_version/src/Map.cpp b/desktop_version/src/Map.cpp
index 74d6a943..674e464f 100644
--- a/desktop_version/src/Map.cpp
+++ b/desktop_version/src/Map.cpp
@@ -1,6 +1,7 @@
 #define MAP_DEFINITION
 #include "Map.h"
 
+#include "Alloc.h"
 #include "Constants.h"
 #include "CustomLevels.h"
 #include "Entity.h"
@@ -48,7 +49,6 @@ mapclass::mapclass(void)
 
     custommode=false;
     custommodeforreal=false;
-    customwidth=20; customheight=20;
     custommmxoff=0; custommmyoff=0; custommmxsize=0; custommmysize=0;
     customzoom=0;
     customshowmm=true;
@@ -81,10 +81,18 @@ mapclass::mapclass(void)
 
     nexttowercolour_set = false;
 
-    roomname = "";
+    setroomname("");
     hiddenname = "";
 }
 
+static char roomname_static[SCREEN_WIDTH_CHARS];
+static char* roomname_heap;
+
+void mapclass::destroy(void)
+{
+    VVV_free(roomname_heap);
+}
+
 //Areamap starts at 100,100 and extends 20x20
 const int mapclass::areamap[] = {
     1,2,2,2,2,2,2,2,0,3,0,0,0,4,4,4,4,4,4,4,
@@ -109,6 +117,30 @@ const int mapclass::areamap[] = {
     2,2,2,2,2,0,0,2,0,3,0,0,0,0,0,0,0,0,0,0,
 };
 
+int mapclass::getwidth(void)
+{
+#ifndef NO_CUSTOM_LEVELS
+    if (custommode)
+    {
+        return cl.mapwidth;
+    }
+#endif
+
+    return 20;
+}
+
+int mapclass::getheight(void)
+{
+#ifndef NO_CUSTOM_LEVELS
+    if (custommode)
+    {
+        return cl.mapheight;
+    }
+#endif
+
+    return 20;
+}
+
 int mapclass::intpol(int a, int b, float c)
 {
     return static_cast<int>(a + ((b - a) * c));
@@ -116,6 +148,11 @@ int mapclass::intpol(int a, int b, float c)
 
 void mapclass::setteleporter(int x, int y)
 {
+    if (x < 0 || x >= getwidth() || y < 0 || y >= getheight())
+    {
+        return;
+    }
+
     point temp;
     temp.x = x;
     temp.y = y;
@@ -124,12 +161,36 @@ void mapclass::setteleporter(int x, int y)
 
 void mapclass::settrinket(int x, int y)
 {
+    if (x < 0 || x >= getwidth() || y < 0 || y >= getheight())
+    {
+        return;
+    }
+
     point temp;
     temp.x = x;
     temp.y = y;
     shinytrinkets.push_back(temp);
 }
 
+void mapclass::setroomname(const char* name)
+{
+    VVV_free(roomname_heap);
+
+    const size_t size = SDL_strlcpy(
+        roomname_static, name, sizeof(roomname_static)
+    ) + 1;
+    roomname = roomname_static;
+
+    if (size > sizeof(roomname_static))
+    {
+        roomname_heap = SDL_strdup(name);
+        if (roomname_heap != NULL)
+        {
+            roomname = roomname_heap;
+        }
+    }
+}
+
 void mapclass::resetmap(void)
 {
     //clear the explored area of the map
@@ -1353,7 +1414,7 @@ void mapclass::loadlevel(int rx, int ry)
     obj.customplatformtile=0;
     obj.vertplatforms = false;
     obj.horplatforms = false;
-    roomname = "";
+    setroomname("");
     hiddenname = "";
     background = 1;
     warpx = false;
@@ -1485,7 +1546,7 @@ void mapclass::loadlevel(int rx, int ry)
         extrarow = 1;
         const short* tmap = otherlevel.loadlevel(rx, ry);
         copy_short_to_int(contents, tmap, SDL_arraysize(contents));
-        roomname = otherlevel.roomname;
+        setroomname(otherlevel.roomname);
         hiddenname = otherlevel.hiddenname;
         tileset = otherlevel.roomtileset;
         break;
@@ -1494,7 +1555,7 @@ void mapclass::loadlevel(int rx, int ry)
     {
         const short* tmap = lablevel.loadlevel(rx, ry);
         copy_short_to_int(contents, tmap, SDL_arraysize(contents));
-        roomname = lablevel.roomname;
+        setroomname(lablevel.roomname);
         tileset = 1;
         background = 2;
         graphics.rcol = lablevel.rcol;
@@ -1507,7 +1568,7 @@ void mapclass::loadlevel(int rx, int ry)
         graphics.towerbg.scrolldir = 0;
         setbgobjlerp(graphics.towerbg);
 
-        roomname = "The Tower";
+        setroomname("The Tower");
         tileset = 1;
         background = 3;
         towermode = true;
@@ -1541,7 +1602,7 @@ void mapclass::loadlevel(int rx, int ry)
     {
         const short* tmap = warplevel.loadlevel(rx, ry);
         copy_short_to_int(contents, tmap, SDL_arraysize(contents));
-        roomname = warplevel.roomname;
+        setroomname(warplevel.roomname);
         tileset = 1;
         background = 3;
         graphics.rcol = warplevel.rcol;
@@ -1559,7 +1620,7 @@ void mapclass::loadlevel(int rx, int ry)
     {
         const short* tmap = spacestation2.loadlevel(rx, ry);
         copy_short_to_int(contents, tmap, SDL_arraysize(contents));
-        roomname = spacestation2.roomname;
+        setroomname(spacestation2.roomname);
         tileset = 0;
         break;
     }
@@ -1567,7 +1628,7 @@ void mapclass::loadlevel(int rx, int ry)
     {
         const short* tmap = finallevel.loadlevel(rx, ry);
         copy_short_to_int(contents, tmap, SDL_arraysize(contents));
-        roomname = finallevel.roomname;
+        setroomname(finallevel.roomname);
         tileset = 1;
         background = 3;
         graphics.backgrounddrawn = false;
@@ -1597,7 +1658,7 @@ void mapclass::loadlevel(int rx, int ry)
         graphics.towerbg.scrolldir = 1;
         setbgobjlerp(graphics.towerbg);
 
-        roomname = "Panic Room";
+        setroomname("Panic Room");
         tileset = 1;
         background = 3;
         towermode = true;
@@ -1619,7 +1680,7 @@ void mapclass::loadlevel(int rx, int ry)
         graphics.towerbg.scrolldir = 1;
         setbgobjlerp(graphics.towerbg);
 
-        roomname = "Panic Room";
+        setroomname("Panic Room");
         tileset = 1;
         background = 3;
         towermode = true;
@@ -1648,7 +1709,7 @@ void mapclass::loadlevel(int rx, int ry)
         graphics.towerbg.scrolldir = 0;
         setbgobjlerp(graphics.towerbg);
 
-        roomname = "The Final Challenge";
+        setroomname("The Final Challenge");
         tileset = 1;
         background = 3;
         towermode = true;
@@ -1693,7 +1754,7 @@ void mapclass::loadlevel(int rx, int ry)
         graphics.towerbg.scrolldir = 0;
         setbgobjlerp(graphics.towerbg);
 
-        roomname = "The Final Challenge";
+        setroomname("The Final Challenge");
         tileset = 1;
         background = 3;
         towermode = true;
@@ -1726,7 +1787,7 @@ void mapclass::loadlevel(int rx, int ry)
     {
         const short* tmap = finallevel.loadlevel(rx, ry);
         copy_short_to_int(contents, tmap, SDL_arraysize(contents));
-        roomname = finallevel.roomname;
+        setroomname(finallevel.roomname);
         tileset = 2;
         if (rx == 108)
         {
@@ -1809,7 +1870,7 @@ void mapclass::loadlevel(int rx, int ry)
             break;
         }
 
-        roomname = room->roomname.c_str();
+        setroomname(room->roomname.c_str());
         extrarow = 1;
         const int* tmap = cl.loadlevel(rx, ry);
         SDL_memcpy(contents, tmap, sizeof(contents));
diff --git a/desktop_version/src/Map.h b/desktop_version/src/Map.h
index dcd2e2df..8268e7bf 100644
--- a/desktop_version/src/Map.h
+++ b/desktop_version/src/Map.h
@@ -22,6 +22,11 @@ class mapclass
 {
 public:
     mapclass(void);
+    void destroy(void);
+
+    int getwidth(void);
+
+    int getheight(void);
 
     int intpol(int a, int b, float c);
 
@@ -29,6 +34,8 @@ public:
 
     void settrinket(int x, int y);
 
+    void setroomname(const char* name);
+
     void resetmap(void);
 
     void resetnames(void);
@@ -129,7 +136,6 @@ public:
     //Variables for playing custom levels
     bool custommode;
     bool custommodeforreal;
-    int customwidth, customheight;
     int custommmxoff, custommmyoff, custommmxsize, custommmysize;
     int customzoom;
     bool customshowmm;
diff --git a/desktop_version/src/Music.cpp b/desktop_version/src/Music.cpp
index 3e52c667..9c9ee0aa 100644
--- a/desktop_version/src/Music.cpp
+++ b/desktop_version/src/Music.cpp
@@ -5,6 +5,7 @@
 #include <FAudio.h>
 #include <physfsrwops.h>
 
+#include "Alloc.h"
 #include "BinaryBlob.h"
 #include "FileSystemUtils.h"
 #include "Game.h"
@@ -21,7 +22,7 @@
 
 #define malloc SDL_malloc
 #define realloc SDL_realloc
-#define free SDL_free
+#define free VVV_free
 #ifdef memset /* Thanks, Apple! */
 #undef memset
 #endif
@@ -121,12 +122,12 @@ public:
         format.cbSize = 0;
         valid = true;
 end:
-        FILESYSTEM_freeMemory(&mem);
+        VVV_free(mem);
     }
 
     void Dispose()
     {
-        SDL_free(wav_buffer);
+        VVV_free(wav_buffer);
     }
 
     void Play()
@@ -146,7 +147,7 @@ end:
                 FAudioVoice_GetVoiceDetails(voices[i], &details);
                 if (details.InputChannels != format.nChannels)
                 {
-                    FAudioVoice_DestroyVoice(voices[i]);
+                    VVV_freefunc(FAudioVoice_DestroyVoice, voices[i]);
                     FAudio_CreateSourceVoice(faudioctx, &voices[i], &format, 0, 2.0f, NULL, NULL, NULL);
                 }
                 const FAudioBuffer faudio_buffer = {
@@ -221,10 +222,9 @@ end:
         {
             for (int i = 0; i < VVV_MAX_CHANNELS; i++)
             {
-                FAudioVoice_DestroyVoice(voices[i]);
+                VVV_freefunc(FAudioVoice_DestroyVoice, voices[i]);
             }
-            SDL_free(voices);
-            voices = NULL;
+            VVV_free(voices);
         }
     }
 
@@ -263,8 +263,7 @@ public:
         if (vorbis == NULL)
         {
             vlog_error("Unable to create Vorbis handle, error %d", err);
-            SDL_free(read_buf);
-            read_buf = NULL;
+            VVV_free(read_buf);
             goto end;
         }
         vorbis_info = stb_vorbis_get_info(vorbis);
@@ -295,13 +294,12 @@ end:
     void Dispose()
     {
         stb_vorbis_close(vorbis);
-        SDL_free(read_buf);
-        SDL_free(decoded_buf_playing);
-        SDL_free(decoded_buf_reserve);
+        VVV_free(read_buf);
+        VVV_free(decoded_buf_playing);
+        VVV_free(decoded_buf_reserve);
         if (!IsHalted())
         {
-            FAudioVoice_DestroyVoice(musicVoice);
-            musicVoice = NULL;
+            VVV_freefunc(FAudioVoice_DestroyVoice, musicVoice);
         }
     }
 
@@ -358,8 +356,7 @@ end:
         if (!IsHalted())
         {
             FAudioSourceVoice_FlushSourceBuffers(musicVoice);
-            FAudioVoice_DestroyVoice(musicVoice);
-            musicVoice = NULL;
+            VVV_freefunc(FAudioVoice_DestroyVoice, musicVoice);
             paused = true;
         }
     }
@@ -535,11 +532,11 @@ end:
                 t->loopbegin = 0;
                 t->looplength = 0;
                 loopend = 0;
-                SDL_free(param);
+                VVV_free(param);
                 break;
             }
 
-            SDL_free(param);
+            VVV_free(param);
         }
         if (loopend != 0)
         {
@@ -792,14 +789,8 @@ void musicclass::destroy(void)
 
     pppppp_blob.clear();
     mmmmmm_blob.clear();
-    if (masteringvoice != NULL)
-    {
-        FAudioVoice_DestroyVoice(masteringvoice);
-    }
-    if (faudioctx != NULL)
-    {
-        FAudio_Release(faudioctx);
-    }
+    VVV_freefunc(FAudioVoice_DestroyVoice, masteringvoice);
+    VVV_freefunc(FAudio_Release, faudioctx);
 }
 
 void musicclass::play(int t)
diff --git a/desktop_version/src/Render.cpp b/desktop_version/src/Render.cpp
index b1c9e315..bda5fdbb 100644
--- a/desktop_version/src/Render.cpp
+++ b/desktop_version/src/Render.cpp
@@ -24,6 +24,15 @@ static int tr;
 static int tg;
 static int tb;
 
+struct MapRenderData
+{
+    int zoom;
+    int xoff;
+    int yoff;
+    int legendxoff;
+    int legendyoff;
+};
+
 static inline void drawslowdowntext(void)
 {
     switch (game.slowdown)
@@ -2040,6 +2049,143 @@ static void draw_roomname_menu(void)
  * the same in Flip Mode. */
 #define FLIP(y, h) (graphics.flipmode ? 220 - (y) - (h) : (y))
 
+static MapRenderData getmaprenderdata()
+{
+    MapRenderData data;
+
+    data.zoom = map.custommode ? map.customzoom : 1;
+    data.xoff = map.custommode ? map.custommmxoff : 0;
+    data.yoff = map.custommode ? map.custommmyoff : 0;
+    data.legendxoff = 40 + data.xoff;
+    data.legendyoff = 21 + data.yoff;
+
+    // Magic numbers for centering legend tiles.
+    switch (data.zoom)
+    {
+    case 4:
+        data.legendxoff += 21;
+        data.legendyoff += 16;
+        break;
+    case 2:
+        data.legendxoff += 9;
+        data.legendyoff += 5;
+        break;
+    default:
+        data.legendxoff += 3;
+        data.legendyoff += 1;
+        break;
+    }
+
+    return data;
+}
+
+static void rendermap(void)
+{
+#ifndef NO_CUSTOM_LEVELS
+    if (map.custommode)
+    {
+        graphics.drawpixeltextbox(35 + map.custommmxoff, 16 + map.custommmyoff, map.custommmxsize + 10, map.custommmysize + 10, 65, 185, 207);
+        graphics.drawpartimage(graphics.minimap_mounted ? 1 : 12, 40 + map.custommmxoff, 21 + map.custommmyoff, map.custommmxsize, map.custommmysize);
+        return;
+     }
+#endif /* NO_CUSTOM_LEVELS */
+
+    graphics.drawpixeltextbox(35, 16, 250, 190, 65, 185, 207);
+    graphics.drawimage(1, 40, 21, false);
+}
+
+static void rendermapfog(void)
+{
+    const MapRenderData data = getmaprenderdata();
+
+    for (int j = 0; j < map.getheight(); j++)
+    {
+        for (int i = 0; i < map.getwidth(); i++)
+        {
+            if (!map.isexplored(i, j))
+            {
+                // Draw the fog, depending on the custom zoom size
+                for (int x = 0; x < data.zoom; x++)
+                {
+                    for (int y = 0; y < data.zoom; y++)
+                    {
+                        graphics.drawimage(2, data.xoff + 40 + (x * 12) + (i * (12 * data.zoom)), data.yoff + 21 + (y * 9) + (j * (9 * data.zoom)), false);
+                    }
+                }
+            }
+        }
+    }
+}
+
+static void rendermaplegend(void)
+{
+    // Draw the map legend, aka teleports/targets/trinkets
+
+    const MapRenderData data = getmaprenderdata();
+
+    const int tile_offset = graphics.flipmode ? 3 : 0;
+
+    for (size_t i = 0; i < map.teleporters.size(); i++)
+    {
+        if (map.showteleporters && map.isexplored(map.teleporters[i].x, map.teleporters[i].y))
+        {
+            graphics.drawtile(data.legendxoff + (map.teleporters[i].x * 12 * data.zoom), data.legendyoff + (map.teleporters[i].y * 9 * data.zoom), 1127 + tile_offset);
+        }
+        else if (map.showtargets && !map.isexplored(map.teleporters[i].x, map.teleporters[i].y))
+        {
+            graphics.drawtile(data.legendxoff + (map.teleporters[i].x * 12 * data.zoom), data.legendyoff + (map.teleporters[i].y * 9 * data.zoom), 1126 + tile_offset);
+        }
+    }
+
+    if (map.showtrinkets)
+    {
+        for (size_t i = 0; i < map.shinytrinkets.size(); i++)
+        {
+            if (!obj.collect[i])
+            {
+                graphics.drawtile(data.legendxoff + (map.shinytrinkets[i].x * 12 * data.zoom), data.legendyoff + (map.shinytrinkets[i].y * 9 * data.zoom), 1086 + tile_offset);
+            }
+        }
+    }
+}
+
+static void rendermapcursor(const bool flashing)
+{
+    const MapRenderData data = getmaprenderdata();
+
+    if (!map.custommode && game.roomx == 109)
+    {
+        // Draw the tower specially
+        if (!flashing)
+        {
+            graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2, 21 + 2, 12 - 4, 180 - 4, 16, 245 - (help.glow * 2), 245 - (help.glow * 2));
+        }
+        else if (map.cursorstate == 1)
+        {
+            if (int(map.cursordelay / 4) % 2 == 0)
+            {
+                graphics.drawrect(40 + ((game.roomx - 100) * 12), 21, 12, 180, 255, 255, 255);
+                graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2, 21 + 2, 12 - 4, 180 - 4, 255, 255, 255);
+            }
+        }
+        else if (map.cursorstate == 2 && (int(map.cursordelay / 15) % 2 == 0))
+        {
+            graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2, 21 + 2, 12 - 4, 180 - 4, 16, 245 - (help.glow), 245 - (help.glow));
+        }
+        return;
+    }
+
+    if (!flashing || (map.cursorstate == 2 && int(map.cursordelay / 15) % 2 == 0))
+    {
+        graphics.drawrect(40 + ((game.roomx - 100) * 12 * data.zoom) + 2 + data.xoff, 21 + ((game.roomy - 100) * 9 * data.zoom) + 2 + data.yoff, (12 * data.zoom) - 4, (9 * data.zoom) - 4, 16, 245 - (help.glow), 245 - (help.glow));
+    }
+    else if (map.cursorstate == 1 && (int(map.cursordelay / 4) % 2 == 0))
+    {
+        graphics.drawrect(40 + ((game.roomx - 100) * 12 * data.zoom) + data.xoff, 21 + ((game.roomy - 100) * 9 * data.zoom) + data.yoff, 12 * data.zoom, 9 * data.zoom, 255, 255, 255);
+        graphics.drawrect(40 + ((game.roomx - 100) * 12 * data.zoom) + 2 + data.xoff, 21 + ((game.roomy - 100) * 9 * data.zoom) + 2 + data.yoff, (12 * data.zoom) - 4, (9 * data.zoom) - 4, 255, 255, 255);
+    }
+}
+
 void maprender(void)
 {
     ClearSurface(graphics.backBuffer);
@@ -2049,8 +2195,6 @@ void maprender(void)
     //Background color
     FillRect(graphics.backBuffer,0, 12, 320, 240, 10, 24, 26 );
 
-
-
     //Menubar:
     graphics.drawtextbox( -10, 212, 43, 3, 65, 185, 207);
 
@@ -2108,11 +2252,11 @@ void maprender(void)
     switch(game.menupage)
     {
     case 0:
+        rendermap();
+
         if (map.finalmode || (map.custommode&&!map.customshowmm))
         {
-            //draw the map image
-            graphics.drawpixeltextbox(35, 16, 250, 190, 65, 185, 207);
-            graphics.drawimage(1, 40, 21, false);
+            // Cover the whole map
             for (int j = 0; j < 20; j++)
             {
                 for (int i = 0; i < 20; i++)
@@ -2122,211 +2266,11 @@ void maprender(void)
             }
             graphics.bprint(-1, 105, "NO SIGNAL", 245, 245, 245, true);
         }
-#ifndef NO_CUSTOM_LEVELS
-        else if(map.custommode)
-        {
-          //draw the map image
-          graphics.drawpixeltextbox(35+map.custommmxoff, 16+map.custommmyoff, map.custommmxsize+10, map.custommmysize+10, 65, 185, 207);
-          if (graphics.minimap_mounted)
-          {
-            graphics.drawpartimage(1, 40+map.custommmxoff, 21+map.custommmyoff, map.custommmxsize, map.custommmysize);
-          }
-          else
-          {
-            graphics.drawpartimage(12, 40+map.custommmxoff, 21+map.custommmyoff, map.custommmxsize,map.custommmysize);
-          }
-
-          //Black out here
-          if(map.customzoom==4){
-            for (int j = 0; j < map.customheight; j++){
-              for (int i = 0; i < map.customwidth; i++){
-                if(!map.isexplored(i, j)){
-                  //Draw the fog of war on the map
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 48), map.custommmyoff+21 + (j * 36), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 48), map.custommmyoff+21 + (j * 36), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 48), map.custommmyoff+21 + 9 + (j * 36), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 48), map.custommmyoff+21 + 9+ (j * 36), false);
-
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 48) + 24, map.custommmyoff+21 + (j * 36), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 48) + 24, map.custommmyoff+21 + (j * 36), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 48) + 24, map.custommmyoff+ 21 + 9 + (j * 36), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 48) + 24, map.custommmyoff+21 + 9+ (j * 36), false);
-
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 48), map.custommmyoff+21 + (j * 36)+18, false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 48), map.custommmyoff+21 + (j * 36)+18, false);
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 48), map.custommmyoff+21 + 9 + (j * 36)+18, false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 48), map.custommmyoff+21 + 9+ (j * 36)+18, false);
-
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 48) + 24, map.custommmyoff+21 + (j * 36)+18, false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 48) + 24, map.custommmyoff+21 + (j * 36)+18, false);
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 48) + 24, map.custommmyoff+21 + 9 + (j * 36)+18, false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 48) + 24, map.custommmyoff+21 + 9+ (j * 36)+18, false);
-                }
-              }
-            }
-          }else if(map.customzoom==2){
-            for (int j = 0; j < map.customheight; j++){
-              for (int i = 0; i < map.customwidth; i++){
-                if(!map.isexplored(i, j)){
-                  //Draw the fog of war on the map
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 24), map.custommmyoff+21 + (j * 18), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 24), map.custommmyoff+21 + (j * 18), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 24), map.custommmyoff+21 + 9 + (j * 18), false);
-                  graphics.drawimage(2, map.custommmxoff+40 + 12 + (i * 24), map.custommmyoff+21 + 9+ (j * 18), false);
-                }
-              }
-            }
-          }else{
-            for (int j = 0; j < map.customheight; j++){
-              for (int i = 0; i < map.customwidth; i++){
-                if(!map.isexplored(i, j)){
-                  //Draw the fog of war on the map
-                  graphics.drawimage(2, map.custommmxoff+40 + (i * 12), map.custommmyoff+21 + (j * 9), false);
-                }
-              }
-            }
-          }
-
-          //normal size maps
-          if(map.customzoom==4){
-            if(map.cursorstate==1){
-              if (int(map.cursordelay / 4) % 2 == 0){
-                graphics.drawrect(40 + ((game.roomx - 100) * 48) +map.custommmxoff, 21 + ((game.roomy - 100) * 36)+map.custommmyoff , 48 , 36 , 255,255,255);
-                graphics.drawrect(40 + ((game.roomx - 100) * 48) + 2+map.custommmxoff, 21 + ((game.roomy - 100) * 36) + 2+map.custommmyoff, 48 - 4, 36 - 4, 255,255,255);
-              }
-            }else if (map.cursorstate == 2){
-              if (int(map.cursordelay / 15) % 2 == 0){
-                graphics.drawrect(40 + ((game.roomx - 100) * 48) + 2+map.custommmxoff, 21 + ((game.roomy - 100) * 36) + 2+map.custommmyoff, 48 - 4, 36 - 4, 16, 245 - (help.glow), 245 - (help.glow));
-              }
-            }
-          }else if(map.customzoom==2){
-            if(map.cursorstate==1){
-              if (int(map.cursordelay / 4) % 2 == 0){
-                graphics.drawrect(40 + ((game.roomx - 100) * 24)+map.custommmxoff , 21 + ((game.roomy - 100) * 18)+map.custommmyoff , 24 , 18 , 255,255,255);
-                graphics.drawrect(40 + ((game.roomx - 100) * 24) + 2+map.custommmxoff, 21 + ((game.roomy - 100) * 18) + 2+map.custommmyoff, 24 - 4, 18 - 4, 255,255,255);
-              }
-            }else if (map.cursorstate == 2){
-              if (int(map.cursordelay / 15) % 2 == 0){
-                graphics.drawrect(40 + ((game.roomx - 100) * 24) + 2+map.custommmxoff, 21 + ((game.roomy - 100) * 18) + 2+map.custommmyoff, 24 - 4, 18 - 4, 16, 245 - (help.glow), 245 - (help.glow));
-              }
-            }
-          }else{
-            if(map.cursorstate==1){
-              if (int(map.cursordelay / 4) % 2 == 0){
-                graphics.drawrect(40 + ((game.roomx - 100) * 12)+map.custommmxoff , 21 + ((game.roomy - 100) * 9)+map.custommmyoff , 12 , 9 , 255,255,255);
-                graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2+map.custommmxoff, 21 + ((game.roomy - 100) * 9) + 2+map.custommmyoff, 12 - 4, 9 - 4, 255,255,255);
-              }
-            }else if (map.cursorstate == 2){
-              if (int(map.cursordelay / 15) % 2 == 0){
-                graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2+map.custommmxoff, 21 + ((game.roomy - 100) * 9) + 2+map.custommmyoff, 12 - 4, 9 - 4, 16, 245 - (help.glow), 245 - (help.glow));
-              }
-            }
-          }
-
-          if(map.showtrinkets){
-            for(size_t i=0; i<map.shinytrinkets.size(); i++){
-              if(!obj.collect[i]){
-                int temp = 1086;
-                if(graphics.flipmode) temp += 3;
-                if(map.customzoom==4){
-                  graphics.drawtile(40 + (map.shinytrinkets[i].x * 48) + 20+map.custommmxoff, 21 + (map.shinytrinkets[i].y * 36) + 14+map.custommmyoff, temp);
-                }else if(map.customzoom==2){
-                  graphics.drawtile(40 + (map.shinytrinkets[i].x * 24) + 8+map.custommmxoff, 21 + (map.shinytrinkets[i].y * 18) + 5+map.custommmyoff, temp);
-                }else{
-                  graphics.drawtile(40 + 3 + (map.shinytrinkets[i].x * 12) + map.custommmxoff, 22 + (map.shinytrinkets[i].y * 9) + map.custommmyoff, temp);
-                }
-              }
-            }
-          }
-        }
-#endif /* NO_CUSTOM_LEVELS */
         else
         {
-            //draw the map image
-            graphics.drawpixeltextbox(35, 16, 250, 190, 65, 185, 207);
-            graphics.drawimage(1, 40, 21, false);
-
-            //black out areas we can't see yet
-            for (int j = 0; j < 20; j++)
-            {
-                for (int i = 0; i < 20; i++)
-                {
-                    if(!map.isexplored(i, j))
-                    {
-                        //Draw the fog of war on the map
-                        graphics.drawimage(2, 40 + (i * 12), 21 + (j * 9), false);
-                    }
-                }
-            }
-            //draw the coordinates
-            if (game.roomx == 109)
-            {
-                //tower!instead of room y, scale map.ypos
-                if (map.cursorstate == 1)
-                {
-                    if (int(map.cursordelay / 4) % 2 == 0)
-                    {
-                        graphics.drawrect(40 + ((game.roomx - 100) * 12) , 21 , 12, 180, 255,255,255);
-                        graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2 , 21  + 2, 12 - 4, 180 - 4, 255,255,255);
-                    }
-                    if (map.cursordelay > 30) map.cursorstate = 2;
-                }
-                else if (map.cursorstate == 2)
-                {
-                    if (int(map.cursordelay / 15) % 2 == 0)
-                    {
-                        graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2 , 21  + 2, 12 - 4, 180 - 4,16, 245 - (help.glow), 245 - (help.glow));
-                    }
-                }
-            }
-            else
-            {
-                if (map.cursorstate == 1)
-                {
-                    if (int(map.cursordelay / 4) % 2 == 0)
-                    {
-                        graphics.drawrect(40 + ((game.roomx - 100) * 12) , 21 + ((game.roomy - 100) * 9) , 12 , 9 , 255,255,255);
-                        graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2, 21 + ((game.roomy - 100) * 9) + 2, 12 - 4, 9 - 4, 255,255,255);
-                    }
-                }
-                else if (map.cursorstate == 2)
-                {
-                    if (int(map.cursordelay / 15) % 2 == 0)
-                    {
-                        graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2, 21 + ((game.roomy - 100) * 9) + 2, 12 - 4, 9 - 4, 16, 245 - (help.glow), 245 - (help.glow));
-                    }
-                }
-            }
-
-            //draw legend details
-            for (size_t i = 0; i < map.teleporters.size(); i++)
-            {
-                if (map.showteleporters && map.isexplored(map.teleporters[i].x, map.teleporters[i].y))
-                {
-                    int temp = 1126 + (int) map.isexplored(map.teleporters[i].x, map.teleporters[i].y);
-                    if (graphics.flipmode) temp += 3;
-                    graphics.drawtile(40 + 3 + (map.teleporters[i].x * 12), 22 + (map.teleporters[i].y * 9), temp);
-                }
-                else if(map.showtargets && !map.isexplored(map.teleporters[i].x, map.teleporters[i].y))
-                {
-                    int temp = 1126 + (int) map.isexplored(map.teleporters[i].x, map.teleporters[i].y);
-                    if (graphics.flipmode) temp += 3;
-                    graphics.drawtile(40 + 3 + (map.teleporters[i].x * 12), 22 + (map.teleporters[i].y * 9), temp);
-                }
-            }
-
-            if (map.showtrinkets)
-            {
-                for (size_t i = 0; i < map.shinytrinkets.size(); i++)
-                {
-                    if (!obj.collect[i])
-                    {
-                        int temp = 1086;
-                        if (graphics.flipmode) temp += 3;
-                        graphics.drawtile(40 + 3 + (map.shinytrinkets[i].x * 12), 22 + (map.shinytrinkets[i].y * 9),    temp);
-                    }
-                }
-            }
+            rendermapfog();
+            rendermapcursor(true);
+            rendermaplegend();
         }
         break;
     case 1:
@@ -2736,31 +2680,13 @@ void teleporterrender(void)
     //Background color
     FillRect(graphics.backBuffer, 0, 12, 320, 240, 10, 24, 26);
 
-    //draw the map image
-    graphics.drawpixeltextbox(35, 16, 250, 190, 65, 185, 207);
-    graphics.drawimage(1, 40, 21, false);
-    //black out areas we can't see yet
-    for (int j = 0; j < 20; j++)
-    {
-        for (int i = 0; i < 20; i++)
-        {
-            if(!map.isexplored(i, j))
-            {
-                graphics.drawimage(2, 40 + (i * 12), 21 + (j * 9), false);
-            }
-        }
-    }
+    rendermap();
+    rendermapfog();
+    rendermapcursor(false);
 
-    //draw the coordinates //current
-    if (game.roomx == 109)
-    {
-        //tower!instead of room y, scale map.ypos
-        graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2, 21  + 2, 12 - 4, 180 - 4, 16, 245 - (help.glow * 2), 245 - (help.glow * 2));
-    }
-    else
-    {
-        graphics.drawrect(40 + ((game.roomx - 100) * 12) + 2, 21 + ((game.roomy - 100) * 9) + 2, 12 - 4, 9 - 4, 16, 245 - (help.glow * 2), 245 - (help.glow * 2));
-    }
+    // Draw a box around the currently selected teleporter
+
+    const MapRenderData data = getmaprenderdata();
 
     if (game.useteleporter)
     {
@@ -2769,48 +2695,21 @@ void teleporterrender(void)
         //draw the coordinates //destination
         int tempx_ = map.teleporters[game.teleport_to_teleporter].x;
         int tempy_ = map.teleporters[game.teleport_to_teleporter].y;
-        graphics.drawrect(40 + (tempx_ * 12) + 1, 21 + (tempy_ * 9) + 1, 12 - 2, 9 - 2, 245 - (help.glow * 2), 16, 16);
-        graphics.drawrect(40 + (tempx_ * 12) + 3, 21 + (tempy_ * 9) + 3, 12 - 6, 9 - 6, 245 - (help.glow * 2), 16, 16);
+        graphics.drawrect(40 + data.xoff + (tempx_ * 12 * data.zoom) + 1, 21 + data.yoff + (tempy_ * 9 * data.zoom) + 1, 12 * data.zoom - 2, 9 * data.zoom - 2, 245 - (help.glow * 2), 16, 16);
+        graphics.drawrect(40 + data.xoff + (tempx_ * 12 * data.zoom) + 3, 21 + data.yoff + (tempy_ * 9 * data.zoom) + 3, 12 * data.zoom - 6, 9 * data.zoom - 6, 245 - (help.glow * 2), 16, 16);
     }
 
-    //draw legend details
-    for (size_t i = 0; i < map.teleporters.size(); i++)
-    {
-        if (map.showteleporters && map.isexplored(map.teleporters[i].x, map.teleporters[i].y))
-        {
-            int temp = 1126 + (int) map.isexplored(map.teleporters[i].x, map.teleporters[i].y);
-            if (graphics.flipmode) temp += 3;
-            graphics.drawtile(40 + 3 + (map.teleporters[i].x * 12), 22 + (map.teleporters[i].y * 9), temp);
-        }
-        else if(map.showtargets && !map.isexplored(map.teleporters[i].x, map.teleporters[i].y))
-        {
-            int temp = 1126 + (int) map.isexplored(map.teleporters[i].x, map.teleporters[i].y);
-            if (graphics.flipmode) temp += 3;
-            graphics.drawtile(40 + 3 + (map.teleporters[i].x * 12), 22 + (map.teleporters[i].y * 9), temp);
-        }
-    }
+    // Draw the legend itself
 
-    if (map.showtrinkets)
-    {
-        for (size_t i = 0; i < map.shinytrinkets.size(); i++)
-        {
-            if (!obj.collect[i])
-            {
-                int temp = 1086;
-                if (graphics.flipmode) temp += 3;
-                graphics.drawtile(40 + 3 + (map.shinytrinkets[i].x * 12), 22 + (map.shinytrinkets[i].y * 9),    temp);
-            }
-        }
-    }
+    rendermaplegend();
+
+    // Highlight the currently selected teleporter
 
     tempx = map.teleporters[game.teleport_to_teleporter].x;
     tempy = map.teleporters[game.teleport_to_teleporter].y;
-    if (game.useteleporter && ((help.slowsine%16)>8))
+    if (game.useteleporter && help.slowsine % 16 > 8)
     {
-        //colour in the legend
-        int temp = 1128;
-        if (graphics.flipmode) temp += 3;
-        graphics.drawtile(40 + 3 + (tempx * 12), 22 + (tempy * 9), temp);
+        graphics.drawtile(data.legendxoff + data.xoff + (tempx * 12 * data.zoom), data.legendyoff + data.yoff + (tempy * 9 * data.zoom), 1128 + (graphics.flipmode ? 3 : 0));
     }
 
     graphics.cutscenebars();
diff --git a/desktop_version/src/Screen.cpp b/desktop_version/src/Screen.cpp
index 29a17720..2f09574d 100644
--- a/desktop_version/src/Screen.cpp
+++ b/desktop_version/src/Screen.cpp
@@ -3,6 +3,7 @@
 
 #include <SDL.h>
 
+#include "Alloc.h"
 #include "Constants.h"
 #include "FileSystemUtils.h"
 #include "Game.h"
@@ -81,17 +82,11 @@ void Screen::init(const struct ScreenSettings* settings)
 
 void Screen::destroy(void)
 {
-#define X(CLEANUP, POINTER) \
-    CLEANUP(POINTER); \
-    POINTER = NULL;
-
     /* Order matters! */
-    X(SDL_DestroyTexture, m_screenTexture);
-    X(SDL_FreeSurface, m_screen);
-    X(SDL_DestroyRenderer, m_renderer);
-    X(SDL_DestroyWindow, m_window);
-
-#undef X
+    VVV_freefunc(SDL_DestroyTexture, m_screenTexture);
+    VVV_freefunc(SDL_FreeSurface, m_screen);
+    VVV_freefunc(SDL_DestroyRenderer, m_renderer);
+    VVV_freefunc(SDL_DestroyWindow, m_window);
 }
 
 void Screen::GetSettings(struct ScreenSettings* settings)
@@ -126,7 +121,7 @@ void Screen::LoadIcon(void)
         return;
     }
     SDL_SetWindowIcon(m_window, icon);
-    SDL_FreeSurface(icon);
+    VVV_freefunc(SDL_FreeSurface, icon);
 }
 #endif /* __APPLE__ */
 
@@ -279,7 +274,7 @@ void Screen::UpdateScreen(SDL_Surface* buffer, SDL_Rect* rect )
 
     if(badSignalEffect)
     {
-        SDL_FreeSurface(buffer);
+        VVV_freefunc(SDL_FreeSurface, buffer);
     }
 
 }
diff --git a/desktop_version/src/Script.cpp b/desktop_version/src/Script.cpp
index 6a2cfc77..7287ede7 100644
--- a/desktop_version/src/Script.cpp
+++ b/desktop_version/src/Script.cpp
@@ -2888,10 +2888,17 @@ void scriptclass::startgamemode( int t )
         map.resetplayer();
         map.gotoroom(game.saverx, game.savery);
         map.initmapdata();
-        if(cl.levmusic>0){
+
+        cl.generatecustomminimap();
+        map.customshowmm = true;
+
+        if (cl.levmusic > 0)
+        {
             music.play(cl.levmusic);
-        }else{
-            music.currentsong=-1;
+        }
+        else
+        {
+            music.currentsong = -1;
         }
         break;
 # endif /* NO_EDITOR */
@@ -3543,7 +3550,7 @@ void scriptclass::loadcustom(const std::string& t)
                 break;
             }
             int ti=help.Int(words[1].c_str());
-            int nti = ti>=0 && ti<=50 ? ti : 1;
+            int nti = ti>=0 ? ti : 1;
             for(int ti2=0; ti2<nti; ti2++){
                 i++;
                 if(INBOUNDS_VEC(i, lines)){
@@ -3568,7 +3575,7 @@ void scriptclass::loadcustom(const std::string& t)
             add("text(cyan,0,0,"+words[1]+")");
 
             int ti=help.Int(words[1].c_str());
-            int nti = ti>=0 && ti<=50 ? ti : 1;
+            int nti = ti>=0 ? ti : 1;
             for(int ti2=0; ti2<nti; ti2++){
                 i++;
                 if(INBOUNDS_VEC(i, lines)){
diff --git a/desktop_version/src/ThirdPartyDeps.c b/desktop_version/src/ThirdPartyDeps.c
index 93ab76e5..c0c7b406 100644
--- a/desktop_version/src/ThirdPartyDeps.c
+++ b/desktop_version/src/ThirdPartyDeps.c
@@ -1,5 +1,7 @@
 #include <SDL_stdinc.h>
 
+#include "Alloc.h"
+
 /* Handle third-party dependencies' needs here */
 
 void* lodepng_malloc(size_t size)
@@ -14,5 +16,5 @@ void* lodepng_realloc(void* ptr, size_t new_size)
 
 void lodepng_free(void* ptr)
 {
-    SDL_free(ptr);
+    VVV_free(ptr);
 }
diff --git a/desktop_version/src/VFormat.c b/desktop_version/src/VFormat.c
index 9676d7e2..f71766ea 100644
--- a/desktop_version/src/VFormat.c
+++ b/desktop_version/src/VFormat.c
@@ -4,6 +4,7 @@
 #include <SDL.h>
 #include <stdbool.h>
 
+#include "Alloc.h"
 #include "CWrappers.h"
 
 
@@ -64,8 +65,8 @@ static inline void call_with_upper(format_callback callback, void* userdata, con
         /* Never mind the capitalization then! Better than nothing. */
         callback(userdata, string, bytes);
 
-        SDL_free(utf32);
-        SDL_free(utf8);
+        VVV_free(utf32);
+        VVV_free(utf8);
         return;
     }
 
@@ -78,8 +79,8 @@ static inline void call_with_upper(format_callback callback, void* userdata, con
 
     callback(userdata, utf8, SDL_strlen(utf8));
 
-    SDL_free(utf32);
-    SDL_free(utf8);
+    VVV_free(utf32);
+    VVV_free(utf8);
 }
 
 
@@ -263,7 +264,7 @@ void vformat_cb_valist(
                             {
                                 callback(userdata, number, SDL_strlen(number));
                             }
-                            SDL_free(number);
+                            VVV_free(number);
                         }
                         else
                         {
@@ -458,7 +459,7 @@ char* vformat_alloc(
 )
 {
     /* Format to an automatically allocated and resized buffer.
-     * Caller must SDL_free. */
+     * Caller must VVV_free. */
 
     va_list args;
     va_start(args, args_index);
diff --git a/desktop_version/src/VFormat.h b/desktop_version/src/VFormat.h
index 44918531..3723524b 100644
--- a/desktop_version/src/VFormat.h
+++ b/desktop_version/src/VFormat.h
@@ -5,7 +5,7 @@
  *  - vformat_cb       Calls a user-supplied callback function for each part of
  *                      the resulting string.
  *  - vformat_buf      Fills a user-supplied buffer with the result.
- *  - vformat_alloc    Allocates a buffer with the result (caller must SDL_free).
+ *  - vformat_alloc    Allocates a buffer with the result (caller must VVV_free).
  *
  * All include the following parameters:
  *  - format_string     The string which needs placeholders to be filled in
diff --git a/desktop_version/src/main.cpp b/desktop_version/src/main.cpp
index 25d4779f..b3fda94d 100644
--- a/desktop_version/src/main.cpp
+++ b/desktop_version/src/main.cpp
@@ -755,6 +755,7 @@ static void cleanup(void)
     graphics.destroy_buffers();
     graphics.destroy();
     music.destroy();
+    map.destroy();
     NETWORK_shutdown();
     SDL_Quit();
     FILESYSTEM_deinit();