/**** 
* Classes
****/ 
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -10;
	self.update = function () {
		self.y += self.speed;
	};
});
// Piggy class
var Piggy = Container.expand(function () {
	var self = Container.call(this);
	var piggyGraphics = self.attachAsset('piggy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.update = function () {
		self.y += self.speed;
	};
});
// Assets will be automatically created and loaded by the LK engine
// 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 () {
		// Player movement logic goes here
	};
});

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

/**** 
* Game Code
****/ 
var dragNode = null;
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 - 100;
var bullets = [];
var piggies = [];
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
LK.gui.top.addChild(scoreTxt);
game.update = function () {
	// Player movement logic
	if (dragNode) {
		dragNode.x = this.x;
		dragNode.y = this.y;
	}
	// Bullet logic
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.y < 0) {
			bullet.destroy();
			bullets.splice(i, 1);
		} else {
			for (var j = piggies.length - 1; j >= 0; j--) {
				var piggy = piggies[j];
				if (bullet.intersects(piggy)) {
					bullet.destroy();
					bullets.splice(i, 1);
					piggy.destroy();
					piggies.splice(j, 1);
					LK.setScore(LK.getScore() + 1);
					scoreTxt.setText(LK.getScore());
					break;
				}
			}
		}
	}
	// Piggy logic
	for (var i = piggies.length - 1; i >= 0; i--) {
		var piggy = piggies[i];
		if (piggy.y > 2732) {
			piggy.destroy();
			piggies.splice(i, 1);
		} else if (piggy.intersects(player)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	}
	// Spawn piggies
	if (LK.ticks % 120 == 0) {
		var piggy = new Piggy();
		piggy.x = Math.random() * 2048;
		piggy.y = 0;
		piggies.push(piggy);
		game.addChild(piggy);
	}
};
game.down = function (x, y, obj) {
	dragNode = player;
};
game.up = function (x, y, obj) {
	dragNode = null;
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y;
	bullets.push(bullet);
	game.addChild(bullet);
};

===================================================================
--- original.js
+++ change.js
@@ -62,10 +62,10 @@
 LK.gui.top.addChild(scoreTxt);
 game.update = function () {
 	// Player movement logic
 	if (dragNode) {
-		dragNode.x = x;
-		dragNode.y = y;
+		dragNode.x = this.x;
+		dragNode.y = this.y;
 	}
 	// Bullet logic
 	for (var i = bullets.length - 1; i >= 0; i--) {
 		var bullet = bullets[i];