/**** 
* Classes
****/ 
var Car = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('car', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.direction = 0;
	self._move_migrated = function () {
		if (self.direction === 0) {
			self.x += self.speed;
		} else {
			self.x -= self.speed;
		}
	};
	self.changeDirection = function () {
		self.direction = self.direction === 0 ? 1 : 0;
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
var car = game.addChild(new Car());
car.x = 2048 / 2;
car.y = 2732 - car.height;
var isGameOver = false;
game.on('down', function (x, y, obj) {
	car.changeDirection();
});
LK.on('tick', function () {
	car._move_migrated();
	if (car.x < 0 || car.x > 2048) {
		isGameOver = true;
	}
	if (isGameOver) {
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
	}
});

===================================================================
--- original.js
+++ change.js