/**** 
* Classes
****/ 
// Doctor class representing the player character
var Doctor = Container.expand(function () {
	var self = Container.call(this);
	var doctorGraphics = self.attachAsset('doctor', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.move = function (x, y, obj) {
		self.x = x;
	};
});
//<Assets used in the game will automatically appear here>
// Heart class representing the collectible heart
var Heart = Container.expand(function () {
	var self = Container.call(this);
	var heartGraphics = self.attachAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.y += 5; // Move downwards
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// Poison class representing the harmful collectible
var Poison = Container.expand(function () {
	var self = Container.call(this);
	var poisonGraphics = self.attachAsset('poison', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.y += 5; // Move downwards
		if (self.y > 2732) {
			self.destroy();
		}
	};
});

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

/**** 
* Game Code
****/ 
var doctor = new Doctor();
doctor.x = 2048 / 2;
doctor.y = 2500;
game.addChild(doctor);
var hearts = [];
var poisons = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnHeart() {
	var heart = new Heart();
	heart.x = Math.random() * 2048;
	heart.y = -50;
	hearts.push(heart);
	game.addChild(heart);
}
function spawnPoison() {
	var poison = new Poison();
	poison.x = Math.random() * 2048;
	poison.y = -50;
	poisons.push(poison);
	game.addChild(poison);
}
var dragNode = null;
game.down = function (x, y, obj) {
	//Set drag node to doctor.
	dragNode = doctor;
	//Also call move handler right away to make effect instant.
	handleMove(x, y, obj);
};
game.move = function (x, y, obj) {
	//Get event position in relation to game object
	if (dragNode) {
		dragNode.x = x;
		dragNode.y = y;
	}
};
game.update = function () {
	if (LK.ticks % 60 == 0) {
		spawnHeart();
		spawnPoison();
	}
	for (var i = hearts.length - 1; i >= 0; i--) {
		if (doctor.intersects(hearts[i])) {
			score += 1;
			scoreTxt.setText(score);
			hearts[i].destroy();
			hearts.splice(i, 1);
		}
	}
	for (var j = poisons.length - 1; j >= 0; j--) {
		if (doctor.intersects(poisons[j])) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	}
};
//Mouse or touch up on game object
game.up = function (x, y, obj) {
	dragNode = null;
};

===================================================================
--- original.js
+++ change.js
@@ -9,9 +9,8 @@
 		anchorY: 0.5
 	});
 	self.move = function (x, y, obj) {
 		self.x = x;
-		self.visible = true;
 	};
 });
 //<Assets used in the game will automatically appear here>
 // Heart class representing the collectible heart