===================================================================
--- original.js
+++ change.js
@@ -1,87 +1,87 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Define the Car class
 var Car = Container.expand(function () {
-  var self = Container.call(this);
-  var carGraphics = self.attachAsset('car', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 2;
-  self.update = function () {
-    self.y += self.speed;
-  };
+	var self = Container.call(this);
+	var carGraphics = self.attachAsset('car', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 2;
+	self.update = function () {
+		self.y -= self.speed;
+	};
 });
 // The assets will be automatically created and loaded by the LK engine
 // Define the Player class
 var Player = Container.expand(function () {
-  var self = Container.call(this);
-  var playerGraphics = self.attachAsset('player', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 5;
-  self.update = function () {
-    self.x += self.speed;
-  };
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		self.x += self.speed;
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 // Init game with black background 
+	backgroundColor: 0x000000 // Init game with black background 
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Initialize player and cars
 var player = game.addChild(new Player());
 player.x = 2048 / 2;
 player.y = 2732 - 200;
 var cars = [];
 for (var i = 0; i < 5; i++) {
-  var car = game.addChild(new Car());
-  car.x = Math.random() * 2048;
-  car.y = Math.random() * 2732;
-  cars.push(car);
+	var car = game.addChild(new Car());
+	car.x = Math.random() * 2048;
+	car.y = Math.random() * 2732;
+	cars.push(car);
 }
 // Game update function
 game.update = function () {
-  // Update player and cars
-  player.update();
-  for (var i = 0; i < cars.length; i++) {
-    cars[i].update();
-  }
-  // Check for collisions
-  for (var i = 0; i < cars.length; i++) {
-    if (player.intersects(cars[i])) {
-      LK.showGameOver();
-      break;
-    }
-  }
-  // Check for off-screen cars
-  for (var i = cars.length - 1; i >= 0; i--) {
-    if (cars[i].y > 2732) {
-      cars[i].destroy();
-      cars.splice(i, 1);
-      var car = game.addChild(new Car());
-      car.x = Math.random() * 2048;
-      car.y = 0;
-      cars.push(car);
-    }
-  }
+	// Update player and cars
+	player.update();
+	for (var i = 0; i < cars.length; i++) {
+		cars[i].update();
+	}
+	// Check for collisions
+	for (var i = 0; i < cars.length; i++) {
+		if (player.intersects(cars[i])) {
+			LK.showGameOver();
+			break;
+		}
+	}
+	// Check for off-screen cars
+	for (var i = cars.length - 1; i >= 0; i--) {
+		if (cars[i].y < 0) {
+			cars[i].destroy();
+			cars.splice(i, 1);
+			var car = game.addChild(new Car());
+			car.x = Math.random() * 2048;
+			car.y = 0;
+			cars.push(car);
+		}
+	}
 };
 // Game touch events
 game.down = function (x, y, obj) {
-  if (x < player.x) {
-    player.speed = -5;
-  } else {
-    player.speed = 5;
-  }
+	if (x < player.x) {
+		player.speed = -5;
+	} else {
+		player.speed = 5;
+	}
 };
 game.up = function (x, y, obj) {
-  player.speed = 0;
+	player.speed = 0;
 };
\ No newline at end of file