===================================================================
--- original.js
+++ change.js
@@ -1,101 +1,107 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Obstacle class
 var Obstacle = Container.expand(function () {
-  var self = Container.call(this);
-  var obstacleGraphics = self.attachAsset('obstacle', {
-    anchorX: 0.5,
-    anchorY: 1.0
-  });
-  self.speed = -5;
-  self.move = function () {
-    self.x += self.speed;
-  };
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.speed = -5;
+	self.move = function () {
+		self.x += self.speed;
+	};
 });
 // Assets will be automatically created based on usage in the code.
 // Pony class
 var Pony = Container.expand(function () {
-  var self = Container.call(this);
-  var ponyGraphics = self.attachAsset('pony', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.jumpSpeed = -15;
-  self.gravity = 0.5;
-  self.velocity = 0;
-  self.isJumping = false;
-  self.jump = function () {
-    if (!self.isJumping) {
-      self.velocity = self.jumpSpeed;
-      self.isJumping = true;
-    }
-  };
-  self.update = function () {
-    self.y += self.velocity;
-    self.velocity += self.gravity;
-    if (self.y > game.floorLevel) {
-      self.y = game.floorLevel;
-      self.isJumping = false;
-    }
-  };
+	var self = Container.call(this);
+	var ponyGraphics = self.attachAsset('pony', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.jumpSpeed = -15;
+	self.gravity = 0.5;
+	self.velocity = 0;
+	self.isJumping = false;
+	self.jump = function () {
+		if (!self.isJumping) {
+			self.velocity = self.jumpSpeed;
+			self.isJumping = true;
+		}
+	};
+	self.update = function () {
+		self.y += self.velocity;
+		self.velocity += self.gravity;
+		if (self.y > game.floorLevel) {
+			self.y = game.floorLevel;
+			self.isJumping = false;
+		}
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x87CEEB // Light blue background
+	backgroundColor: 0x87CEEB // Light blue background
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Game variables
+var forestBackground = game.addChild(LK.getAsset('forest', {
+	anchorX: 0.0,
+	anchorY: 0.0,
+	x: 0,
+	y: 0
+}));
 game.floorLevel = 2732 - 200; // Floor level where the pony runs
 game.obstacles = [];
 game.score = 0;
 game.pony = game.addChild(new Pony());
 game.pony.x = 400;
 game.pony.y = game.floorLevel;
 // Score display
 var scoreTxt = new Text2('0', {
-  size: 150,
-  fill: "#ffffff"
+	size: 150,
+	fill: "#ffffff"
 });
 LK.gui.top.addChild(scoreTxt);
 // Game tick event
 LK.on('tick', function () {
-  game.pony.update();
-  // Move and check obstacles
-  for (var i = game.obstacles.length - 1; i >= 0; i--) {
-    game.obstacles[i].move();
-    if (game.obstacles[i].x < -100) {
-      // Off-screen
-      game.obstacles[i].destroy();
-      game.obstacles.splice(i, 1);
-    } else if (game.pony.intersects(game.obstacles[i])) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-    }
-  }
-  // Increase score over time
-  if (LK.ticks % 60 == 0) {
-    // Every second
-    game.score += 1;
-    scoreTxt.setText(game.score.toString());
-  }
-  // Add obstacles
-  if (LK.ticks % 300 == 0) {
-    // Every 5 seconds
-    var newObstacle = new Obstacle();
-    newObstacle.x = 2048;
-    newObstacle.y = game.floorLevel;
-    game.obstacles.push(newObstacle);
-    game.addChild(newObstacle);
-  }
+	game.pony.update();
+	// Move and check obstacles
+	for (var i = game.obstacles.length - 1; i >= 0; i--) {
+		game.obstacles[i].move();
+		if (game.obstacles[i].x < -100) {
+			// Off-screen
+			game.obstacles[i].destroy();
+			game.obstacles.splice(i, 1);
+		} else if (game.pony.intersects(game.obstacles[i])) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+		}
+	}
+	// Increase score over time
+	if (LK.ticks % 60 == 0) {
+		// Every second
+		game.score += 1;
+		scoreTxt.setText(game.score.toString());
+	}
+	// Add obstacles
+	if (LK.ticks % 300 == 0) {
+		// Every 5 seconds
+		var newObstacle = new Obstacle();
+		newObstacle.x = 2048;
+		newObstacle.y = game.floorLevel;
+		game.obstacles.push(newObstacle);
+		game.addChild(newObstacle);
+	}
 });
 // Touch event to make the pony jump
 game.on('down', function (obj) {
-  game.pony.jump();
+	game.pony.jump();
 });
\ No newline at end of file