var Snowball = Container.expand(function () {
	var self = Container.call(this);
	var snowballGraphics = self.createAsset('snowball', 'Snowball Graphics', .5, .5);
	self.speed = -5;
	self.targetX = 0;
	self.targetY = 0;
	self.speedX = 0;
	self.speedY = 0;
	self.move = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
});
var ZombieKid = Container.expand(function () {
	var self = Container.call(this);
	var zombieKidGraphics = self.createAsset('zombieKid', 'Zombie Kid Graphics', .5, .5);
	self.speed = 1;
	self.move = function () {
		self.y += self.speed;
	};
});
var Santa = Container.expand(function () {
	var self = Container.call(this);
	var santaGraphics = self.createAsset('santa', 'Santa Graphics', .5, .5);
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	LK.stageContainer.setBackgroundColor(0x008080);
	var santa = self.addChild(new Santa());
	santa.x = 2048 / 2;
	santa.y = 2732 - santa.height;
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff"
	});
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	self.updateScoreDisplay = function () {
		scoreTxt.setText(LK.getScore().toString());
	};
	self.updateScoreDisplay();
	var snowballs = [];
	var zombieKids = [];
	var touchStartTime = 0;
	stage.on('down', function (obj) {
		touchStartTime = LK.ticks;
	});
	stage.on('up', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		if (snowballs.length < 5) {
			var newSnowball = new Snowball();
			newSnowball.x = santa.x;
			newSnowball.y = santa.y;
			newSnowball.targetX = pos.x;
			newSnowball.targetY = pos.y;
			var dx = newSnowball.targetX - newSnowball.x;
			var dy = newSnowball.targetY - newSnowball.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			var throwSpeed = 5;
			var touchDuration = LK.ticks - touchStartTime;
			var speedMultiplier = Math.min(touchDuration / 30, 10) * throwSpeed;
			newSnowball.speedX = -dx / distance * newSnowball.speed * speedMultiplier;
			newSnowball.speedY = -Math.abs(dy / distance * newSnowball.speed) * speedMultiplier;
			snowballs.push(newSnowball);
			self.addChild(newSnowball);
		}
	});
	LK.on('tick', function () {
		for (var a = snowballs.length - 1; a >= 0; a--) {
			if (snowballs[a]) {
				snowballs[a].move();
				for (var b = zombieKids.length - 1; b >= 0; b--) {
					if (zombieKids[b] && snowballs[a].intersects(zombieKids[b])) {
						LK.setScore(LK.getScore() + 1);
						self.updateScoreDisplay();
						zombieKids[b].destroy();
						zombieKids.splice(b, 1);
						snowballs[a].destroy();
						snowballs.splice(a, 1);
						break;
					}
				}
				if (snowballs[a] && snowballs[a].y < -50) {
					snowballs[a].destroy();
					snowballs.splice(a, 1);
				}
			}
		}
		for (var b = zombieKids.length - 1; b >= 0; b--) {
			if (zombieKids[b]) {
				zombieKids[b].move();
			}
			if (zombieKids[b].y > 2732) {
				LK.showGameOver();
			}
		}
		if (LK.ticks % 60 == 0) {
			var newZombieKid = new ZombieKid();
			newZombieKid.x = Math.random() * (2048 - newZombieKid.width);
			newZombieKid.y = -newZombieKid.height;
			zombieKids.push(newZombieKid);
			self.addChild(newZombieKid);
		}
	});
});

===================================================================
--- original.js
+++ change.js
@@ -47,23 +47,25 @@
 	});
 	stage.on('up', function (obj) {
 		var event = obj.event;
 		var pos = event.getLocalPosition(self);
-		var newSnowball = new Snowball();
-		newSnowball.x = santa.x;
-		newSnowball.y = santa.y;
-		newSnowball.targetX = pos.x;
-		newSnowball.targetY = pos.y;
-		var dx = newSnowball.targetX - newSnowball.x;
-		var dy = newSnowball.targetY - newSnowball.y;
-		var distance = Math.sqrt(dx * dx + dy * dy);
-		var throwSpeed = 5;
-		var touchDuration = LK.ticks - touchStartTime;
-		var speedMultiplier = Math.min(touchDuration / 30, 10) * throwSpeed;
-		newSnowball.speedX = -dx / distance * newSnowball.speed * speedMultiplier;
-		newSnowball.speedY = -Math.abs(dy / distance * newSnowball.speed) * speedMultiplier;
-		snowballs.push(newSnowball);
-		self.addChild(newSnowball);
+		if (snowballs.length < 5) {
+			var newSnowball = new Snowball();
+			newSnowball.x = santa.x;
+			newSnowball.y = santa.y;
+			newSnowball.targetX = pos.x;
+			newSnowball.targetY = pos.y;
+			var dx = newSnowball.targetX - newSnowball.x;
+			var dy = newSnowball.targetY - newSnowball.y;
+			var distance = Math.sqrt(dx * dx + dy * dy);
+			var throwSpeed = 5;
+			var touchDuration = LK.ticks - touchStartTime;
+			var speedMultiplier = Math.min(touchDuration / 30, 10) * throwSpeed;
+			newSnowball.speedX = -dx / distance * newSnowball.speed * speedMultiplier;
+			newSnowball.speedY = -Math.abs(dy / distance * newSnowball.speed) * speedMultiplier;
+			snowballs.push(newSnowball);
+			self.addChild(newSnowball);
+		}
 	});
 	LK.on('tick', function () {
 		for (var a = snowballs.length - 1; a >= 0; a--) {
 			if (snowballs[a]) {