function Session() {
	var game = JSON.parse(localStorage.getItem('game'));
	var options = JSON.parse(localStorage.getItem('options')) || defaultOptions();

	return {
		getOptions: getOptions,
		getGame: getGame,
		save: save,
		setOptions: setOptions
	};

	function getGame() {
		return game;
	}

	function update(state) {
		game = state;
	}

	function save() {
		localStorage.setItem('game', JSON.stringify(game));
	}

	function merge(a, b) {
		for(var key in b) {
			var value = b[key];
			if(typeof value == "object") {
				if(Array.isArray(value)) {
					a[key] = [];
					for(var i = 0; i < value.length; i++) {
						a[key][i] = value[i];
					}
				} else {
					merge(a[key], value);
				}
			} else {
				if(value !== undefined) {
					a[key] = value;
				} else {
					delete a[key];
				}
			}
		}
	}

	function setOptions(newOptions) {
		merge(options, newOptions);
		localStorage.setItem('options', JSON.stringify(options));
	}

	function defaultOptions() {
		var o = {
			layout: {
				'a': 'A',
				'b': 'B',
				'ArrowLeft': 'Left',
				'ArrowRight': 'Right',
				'ArrowUp': 'Up',
				'ArrowDown': 'Down',
				'Enter': 'Start',
				' ': 'Select'
			},
			textSpeed: 'medium'
		};
		localStorage.setItem('options', JSON.stringify(o));
		return o;
	}

	function getOptions() {
		return options;
	}
}