/**** 
* Classes
****/ 
var Background = Container.expand(function () {
	var self = Container.call(this);
	var backgroundGraphics = self.attachAsset('background', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 1;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.y = 0;
		}
	};
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 0;
	self.gravity = 0.5;
	self.jumpForce = -15;
	self.grounded = false;
	self.update = function () {
		self.y += self.speed;
		self.x += self.speedX;
		scoreTxt.setText(score);
		if (LK.ticks % 180 == 0) {
			var newThorns = new Thorns();
			newThorns.spawn(Math.random() < 0.5 ? 0 : 2048, 0);
			game.addChild(newThorns);
			thornsArray.push(newThorns);
		}
		playerGraphics.scale.x = self.speedX > 0 ? 1 : -1;
		self.speed += self.gravity;
		if (self.x <= 0 + playerGraphics.width / 2) {
			self.x = 0 + playerGraphics.width / 2;
			self.speedX = 20;
			score += 1;
			scoreTxt.setText(score);
		} else if (self.x >= 2048 - playerGraphics.width / 2) {
			self.x = 2048 - playerGraphics.width / 2;
			self.speedX = -20;
			score += 1;
			scoreTxt.setText(score);
		}
		if (self.y > 2732 - playerGraphics.height / 2) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
		for (var i = 0; i < game.children.length; i++) {
			if (game.children[i] instanceof Thorns && self.intersects(game.children[i])) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
			}
		}
	};
	self.jump = function () {
		self.speed = self.jumpForce;
		self.grounded = false;
		LK.getSound('jump').play();
	};
});
var Thorns = Container.expand(function () {
	var self = Container.call(this);
	var thornsGraphics = self.attachAsset('thorns', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732 + thornsGraphics.height / 2) {
			self.destroy();
			var index = thornsArray.indexOf(self);
			if (index > -1) {
				thornsArray.splice(index, 1);
			}
		}
	};
	self.spawn = function (x, y) {
		self.x = x;
		self.y = y;
		if (x == 0) {
			thornsGraphics.scale.x = 1;
		} else {
			thornsGraphics.scale.x = -1;
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x66b5e4
});

/**** 
* Game Code
****/ 
var thornsArray = [];
game.down = function (x, y, obj) {
	player.jump();
};
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var background = game.addChild(new Background());
background.x = 1024;
background.y = 1366;
var player = game.addChild(new Player());
var score = 0;
player.x = 1024;
player.y = 1366;
player.speedX = -20;

===================================================================
--- original.js
+++ change.js
@@ -61,8 +61,9 @@
 	};
 	self.jump = function () {
 		self.speed = self.jumpForce;
 		self.grounded = false;
+		LK.getSound('jump').play();
 	};
 });
 var Thorns = Container.expand(function () {
 	var self = Container.call(this);