/**** 
* Classes
****/ 
// Create a Background class
var Background = Container.expand(function () {
	var self = Container.call(this);
	// Attach background asset
	var backgroundGraphics = self.attachAsset('background', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set background speed
	self.speed = 5;
	// This is automatically called every game tick, if the background is attached!
	self.update = function () {
		// Move background downwards
		self.y += self.speed;
		// If the background has moved off the screen, reset its position
		if (self.y >= 2732) {
			self.y = 0;
		}
	};
});
// Create a Bike class
var Bike = Container.expand(function () {
	var self = Container.call(this);
	// Attach bike asset
	var bikeGraphics = self.attachAsset('bike', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set bike speed
	self.speed = 5;
	// This is automatically called every game tick, if the bike is attached!
	self.update = function () {
		// No movement
	};
});

/**** 
* Initialize Game
****/ 
// Initialize bike asset
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background
});

/**** 
* Game Code
****/ 
// Initialize a second background
var background2 = game.addChild(new Background());
// Position the second background above the first
background2.x = 2048 / 2;
background2.y = -2732 / 2;
// Add bike to the game
// Initialize background
var background = game.addChild(new Background());
// Position background at the center of the screen
background.x = 2048 / 2;
background.y = 2732 / 2;
var bike = game.addChild(new Bike());
// Position bike at the center horizontally and at the lower end of the screen vertically
bike.x = 2048 / 2; // Middle of the screen horizontally
bike.y = 2732 * 0.8; // Lower end of the screen vertically
// Move bike
bike.update();
// Check if bike has reached the finish line
if (bike.x >= 2048) {
	// Bike has reached the finish line, show game over
	LK.showGameOver();
}

===================================================================
--- original.js
+++ change.js
@@ -1,7 +1,27 @@
 /**** 
 * Classes
 ****/ 
+// Create a Background class
+var Background = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach background asset
+	var backgroundGraphics = self.attachAsset('background', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Set background speed
+	self.speed = 5;
+	// This is automatically called every game tick, if the background is attached!
+	self.update = function () {
+		// Move background downwards
+		self.y += self.speed;
+		// If the background has moved off the screen, reset its position
+		if (self.y >= 2732) {
+			self.y = 0;
+		}
+	};
+});
 // Create a Bike class
 var Bike = Container.expand(function () {
 	var self = Container.call(this);
 	// Attach bike asset
@@ -27,15 +47,23 @@
 
 /**** 
 * Game Code
 ****/ 
+// Initialize a second background
+var background2 = game.addChild(new Background());
+// Position the second background above the first
+background2.x = 2048 / 2;
+background2.y = -2732 / 2;
 // Add bike to the game
-// Initialize bike asset
-var background = game.addChild(LK.getAsset('background', {}));
+// Initialize background
+var background = game.addChild(new Background());
+// Position background at the center of the screen
+background.x = 2048 / 2;
+background.y = 2732 / 2;
 var bike = game.addChild(new Bike());
 // Position bike at the center horizontally and at the lower end of the screen vertically
 bike.x = 2048 / 2; // Middle of the screen horizontally
-bike.y = 2732 * 0.3; // Lower end of the screen vertically
+bike.y = 2732 * 0.8; // Lower end of the screen vertically
 // Move bike
 bike.update();
 // Check if bike has reached the finish line
 if (bike.x >= 2048) {