var Gift = Container.expand(function () {
	var self = Container.call(this);
	var giftGraphics = self.createAsset('gift', 'Gift Graphics', .5, .5);
	self.move = function () {};
	self.update = function () {};
});
var Santa = Container.expand(function () {
	var self = Container.call(this);
	var santaGraphics = self.createAsset('santa', 'Santa Graphics', .5, .5);
	self.move = function () {};
	self.update = function () {};
});
var Factory = Container.expand(function () {
	var self = Container.call(this);
	var factoryGraphics = self.createAsset('factory', 'Factory Graphics', .5, .5);
	self.produceGift = function () {
		LK.setInterval(function () {
			LK.setScore(LK.getScore() + 5);
		}, 1000);
	};
	self.update = function () {};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var gifts = [];
	var factories = [];
	var santa = self.addChild(new Santa());
	santa.x = 2048 / 2;
	santa.y = 2732 / 2;
	var factory = self.addChild(new Factory());
	factory.x = 2048 / 4;
	factory.y = 2732 / 4;
	factories.push(factory);
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff"
	});
	var purchaseFactoryButton = self.createAsset('purchaseFactoryButton', 'Purchase Factory Button', 0.5, 1);
	purchaseFactoryButton.x = 2048 / 2;
	purchaseFactoryButton.y = 2732 - purchaseFactoryButton.height / 2;
	self.addChild(purchaseFactoryButton);
	purchaseFactoryButton.on('down', function () {
		var factoryCost = 100;
		if (LK.getScore() >= factoryCost) {
			LK.setScore(LK.getScore() - factoryCost);
			var newFactory = self.addChild(new Factory());
			newFactory.x = 2048 / 4;
			newFactory.y = 2732 / 4 * factories.length;
			factories.push(newFactory);
			newFactory.produceGift();
			scoreTxt.setText(LK.getScore());
		}
	});
	LK.setScore(0);
	scoreTxt.setText(0);
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	santa.on('down', function (obj) {
		console.log('Santa was pressed');
	});
	factory.on('down', function (obj) {
		factory.produceGift();
		scoreTxt.setText(LK.getScore());
	});
	LK.on('tick', function () {
		santa.update();
		for (var i = 0; i < factories.length; i++) {
			factories[i].update();
		}
		for (var i = 0; i < gifts.length; i++) {
			gifts[i].move();
			if (gifts[i].y < -50) {
				gifts[i].destroy();
				gifts.splice(i, 1);
			}
		}
	});
});

===================================================================
--- original.js
+++ change.js
@@ -39,10 +39,11 @@
 	purchaseFactoryButton.x = 2048 / 2;
 	purchaseFactoryButton.y = 2732 - purchaseFactoryButton.height / 2;
 	self.addChild(purchaseFactoryButton);
 	purchaseFactoryButton.on('down', function () {
-		if (LK.getScore() >= 100) {
-			LK.setScore(LK.getScore() - 100);
+		var factoryCost = 100;
+		if (LK.getScore() >= factoryCost) {
+			LK.setScore(LK.getScore() - factoryCost);
 			var newFactory = self.addChild(new Factory());
 			newFactory.x = 2048 / 4;
 			newFactory.y = 2732 / 4 * factories.length;
 			factories.push(newFactory);