/**** 
* Classes
****/ 
var Aim = Container.expand(function () {
	var self = Container.call(this);
	var aimGraphics = self.attachAsset('aim', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var ChristmasGift = Container.expand(function () {
	var self = Container.call(this);
	self.offScreenHandler = function () {
		if (self.y > 2732 || self.x < 0 || self.x > 2048 || self.y < 0) {
			self.flaggedForRemoval = true;
		}
	};
	var giftTypes = ['christmasGift1', 'christmasGift2', 'christmasGift3'];
	var randomType = giftTypes[Math.floor(Math.random() * giftTypes.length)];
	var christmasGiftGraphics = self.createAsset(randomType, {
		anchorX: 0.5,
		anchorY: 1
	});
	self.x = Math.random() * 1536 + 256;
	self.y = Math.random() * 1532 + 500;
});
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.init = function (coinLayer) {
		self.x = Math.random() * (2048 - self.width) + self.width / 2;
		self.y = Math.random() * (2732 - self.height) + self.height / 2;
		self.coinLayer = coinLayer;
		coinLayer.addCoin(self);
	};
	self.on('down', function (x, y, obj) {
		self.coinLayer.removeCoin(self);
		coinAmount += 5;
		self.getGameInstance().wallet._update_migrated();
	});
	pulsate(self, 1.05, 0.01);
});
var CoinLayer = Container.expand(function () {
	var self = Container.call(this);
	self.coins = [];
	self.x = 0;
	self.y = 0;
	self.addCoin = function (coin) {
		self.coins.push(coin);
		self.addChild(coin);
	};
	self.removeCoin = function (coin) {
		var index = self.coins.indexOf(coin);
		if (index > -1) {
			self.coins.splice(index, 1);
			coin.destroy();
		}
	};
	self.updateCoinDisplay = function () {
		var gameInstance = self.getGameInstance();
		if (gameInstance) {
			gameInstance.wallet.setCoinText(self.coins.length);
		}
	};
});
var DamageText = Container.expand(function (damage) {
	var self = Container.call(this);
	var damageText = new Text2((Math.round(damage) || '0').toString(), {
		size: 70,
		fill: '#ff0000',
		weight: 'bold',
		align: 'center'
	});
	damageText.anchor.set(0.5, 0.5);
	self.addChild(damageText);
	self.init = function (x, y) {
		self.targetX = x + (Math.random() * 100 - 50);
		self.x = x;
		self.y = y;
		var fadeStep = 0.05;
		var moveStep = 1;
		var fadeInterval = LK.setInterval(function () {
			self.y -= moveStep;
			self.x += self.targetX / 1000;
			damageText.alpha -= fadeStep;
			if (damageText.alpha <= 0) {
				LK.clearInterval(fadeInterval);
				self.destroy();
			}
		}, 3000 / 60);
	};
});
var GameOverScreen = Container.expand(function (score) {
	var self = Container.call(this);
	var gameOverBg = self.attachAsset('gameOverBg', {});
	gameOverBg.width = LK.gui.width;
	gameOverBg.height = LK.gui.height;
	self.addChild(gameOverBg);
	var scoreText = new Text2('Score: ' + score, {
		size: 100,
		fill: '#ff0000',
		weight: 'bold',
		align: 'center'
	});
	scoreText.anchor.set(0.5, 0.5);
	scoreText.x = LK.gui.width / 2;
	scoreText.y = 500;
	self.addChild(scoreText);
});
var HardHitText = Container.expand(function (x, y) {
	var self = Container.call(this);
	var hardHitTexts = ['Chilled to the bone!', 'Snowball smackdown!', 'Frosty wallop!', 'Icy impact!', 'Blizzard bash!', 'Snowpocalypse strike!', 'Arctic assault!', 'Winter whack!', 'Hailstone hit!', 'Freeze frame!'];
	var randomIndex = Math.floor(Math.random() * hardHitTexts.length);
	var text = new Text2(hardHitTexts[randomIndex], {
		size: 40,
		fill: '#009900',
		weight: 'bold',
		align: 'center'
	});
	text.anchor.set(0.5, 0.5);
	self.addChild(text);
	self.x = x;
	self.y = y;
	var fadeStep = 0.005;
	var moveStep = 1;
	var moveX = Math.random() * 1 - 0.5;
	var fadeInterval = LK.setInterval(function () {
		self.y -= moveStep;
		self.x += moveX;
		text.alpha -= fadeStep;
		if (text.alpha <= 0) {
			LK.clearInterval(fadeInterval);
			self.destroy();
		}
	}, 1000 / 60);
});
var HealthBar = Container.expand(function (maxHealth, size) {
	var self = Container.call(this);
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorY: 0.5
	});
	var healthBarFill = self.attachAsset('healthBarFill', {
		anchorY: 0.5
	});
	healthBarFill.tint = 0x00ff00;
	self.maxHealth = maxHealth;
	self.currentHealth = maxHealth;
	self.updateHealth = function (newHealth) {
		self.currentHealth = newHealth;
		var healthPercentage = self.currentHealth / self.maxHealth;
		healthBarFill.scale.x = healthPercentage;
		var redValue = (1 - healthPercentage) * 255;
		var greenValue = healthPercentage * 255;
		healthBarFill.tint = (redValue << 16) + (greenValue << 8);
	};
	self.init = function () {
		var sizeMultiplier = size / 5 + 1;
		healthBarBg.width = 100 * sizeMultiplier;
		healthBarBg.height = 20 * sizeMultiplier;
		healthBarFill.width = 100 * sizeMultiplier;
		healthBarFill.height = 20 * sizeMultiplier;
		self.addChild(healthBarBg);
		self.addChild(healthBarFill);
	};
	self.init();
});
var IntroScreen = Container.expand(function () {
	var self = Container.call(this);
	var upgradeBg = self.attachAsset('introBg', {});
	var h = H_GUI;
	var w = W_GUI;
	upgradeBg.width = w;
	upgradeBg.height = h;
	self.addChild(upgradeBg);
	var logo = self.attachAsset('logo', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	logo.x = w / 2;
	logo.y = h / 4 - 75;
	self.addChild(logo);
	var playButton = self.attachAsset('playButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	playButton.x = w / 2;
	playButton.y = h - 250;
	var instructionsContainer = new Container();
	var instructionsBg = self.attachAsset('instructionsBg', {});
	instructionsBg.width = w / 1.5;
	instructionsBg.height = w / 2.2;
	instructionsBg.alpha = 0.7;
	instructionsContainer.addChild(instructionsBg);
	var instructionsText = new Text2('- Tap to throw snowballs!\n\n- Hold to throw harder\n\n- Hold and drag to add spin\n\n\n\nPROTECT THE CHRISTMAS GIFTS!', {
		size: 45,
		fill: '#000000',
		weight: 'bold',
		align: 'center'
	});
	instructionsText.anchor.set(0.5, 0.5);
	instructionsText.x = instructionsBg.width / 2;
	instructionsText.y = instructionsBg.height / 2;
	instructionsContainer.addChild(instructionsText);
	instructionsContainer.x = w / 2 - instructionsBg.width / 2;
	instructionsContainer.y = h / 2 - instructionsBg.height / 2 + 150;
	self.addChild(instructionsContainer);
	var playButton2 = self.attachAsset('playButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	playButton2.x = w / 2;
	playButton2.y = h - 250;
	self.addChild(playButton2);
	self.addChild(playButton);
	playButton.blendMode = 2;
	playButton2.blendMode = 1;
	playButton.on('down', function () {
		LK.gui.topLeft.removeChild(self);
		self.destroy();
		game.startNextWave();
	});
	pulsate(playButton2, 1.1);
	pulsate(playButton, 1.05);
});
var ParticleSplash = Container.expand(function (didHit) {
	var self = Container.call(this);
	var particleSplashGraphics = self.attachAsset('particleSplash', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var randomScale = 0.5 + Math.random() * 0.5;
	var alpha = 0.5 + Math.random() * 0.5;
	if (!didHit) {
		randomScale *= 0.5;
	}
	self.scale.x = randomScale;
	self.scale.y = randomScale;
	self.directionX = Math.random() * 2 - 1;
	self.directionY = Math.random() * 2 - 1;
	if (!didHit) {
		self.directionX *= 0.2;
		self.directionY *= 0.2;
	}
	self.animate = function () {
		if (didHit) {
			self.alpha -= 0.01;
		} else {
			self.alpha -= 0.03;
		}
		self.x += self.directionX;
		self.y += self.directionY;
		if (self.alpha <= 0) {
			self.destroy();
		}
	};
});
var ProgressBar = Container.expand(function () {
	var self = Container.call(this);
	var progressBarGraphics = self.attachAsset('progressBar2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.updateProgress = function (progress) {
		progressBarGraphics.scale.x = progress;
		self.alpha = Math.max(progress, 0.15);
	};
	self.init = function () {
		self.x = LK.gui.width / 2;
		self.y = LK.gui.height - 25;
		LK.gui.topLeft.addChild(self);
	};
	self.alpha = 0.45;
	self.maxScale = LK.gui.width / 100;
	self.scale.x = self.maxScale;
	self.height = 45;
	self.init();
});
var Santa = Container.expand(function () {
	var self = Container.call(this);
	var santaGraphics = self.attachAsset('santa', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var Shadow = Container.expand(function () {
	var self = Container.call(this);
	var shadowGraphics = self.attachAsset('shadow', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.follow = function (target) {
		self.x = target.x - (1 - target.percentFromHalf) * 100;
		self.y = target.y + (1 - target.percentFromHalf) * 100;
		var scale = target.scale.x * target.scale.x * 0.7;
		self.scale.x = self.scale.y = scale;
		self.scale.x = self.scale.y = scale;
		self.alpha = .5 * (target.percentFromHalf + .2);
	};
});
var Snowball = Container.expand(function () {
	var self = Container.call(this);
	var snowballGraphics = self.attachAsset('snowball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = Math.pow(1.2, upgrades.snowballs + 1) * -10;
	self.speedX = 0;
	self.speedY = 0;
	self.totalDistance = 0;
	self.spinX = 10;
	self.moves = 0;
	self._move_migrated = function () {
		self.moves++;
		self.totalDistance = Math.sqrt(Math.pow(self.startX - self.x, 2) + Math.pow(self.y - self.startY, 2));
		var halfDistance = self.targetTotalDistance / 2;
		var distanceFromHalf = 0;
		if (self.totalDistance < halfDistance) {
			distanceFromHalf = halfDistance - self.totalDistance;
		} else {
			distanceFromHalf = self.totalDistance - halfDistance;
		}
		var percentFromHalf = distanceFromHalf / halfDistance;
		self.percentFromHalf = percentFromHalf;
		if (percentFromHalf > 1.1) {
			self.shouldBeDestroyed = true;
		} else {
			var scaleAdj = 2 - percentFromHalf * 1.2;
			self.scale.x = 1 + scaleAdj;
			self.scale.y = 1 + scaleAdj;
			self.rotation += self.spinX;
			self.mayHit = scaleAdj < 0.8;
			self.x += self.speedX + self.spinX * self.moves * 3;
			self.y += self.speedY + self.spinY * 100;
			if (self.shadow) {
				self.shadow.follow(self);
			}
		}
	};
	self.init = function () {
		self.targetTotalDistance = Math.sqrt(Math.pow(self.targetX - self.x, 2) + Math.pow(self.y - self.targetY, 2));
		self.shadow = new Shadow();
		self.shadow.follow(self);
		game.addChild(self.shadow);
		game.addChild(self);
		self.spinX = -self.spinX / 5000;
		self.spinY = -self.spinY / 5000;
	};
	self.die = function () {
		self.shadow && self.shadow.destroy();
		self.aim && self.aim.destroy();
		self.destroy();
	};
});
var UpgradeContainer = Container.expand(function () {
	var self = Container.call(this);
	var upgradeBg = self.attachAsset('upgradeBg', {});
	var h = LK.gui.height;
	var w = LK.gui.width;
	upgradeBg.width = w;
	upgradeBg.height = h;
	self.addChild(upgradeBg);
	var upgradeTitleAsset = self.attachAsset('upgradeTitle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	upgradeTitleAsset.x = w / 2;
	upgradeTitleAsset.y = 230;
	self.addChild(upgradeTitleAsset);
	var u1 = new UpgradeItemContainer('snowballs', 'More Ho Ho Ho', 'More snowballs in the air', function () {});
	self.addChild(u1);
	var u2 = new UpgradeItemContainer('strength', 'Increase Christmas Spirit', 'Santa throws harder', function () {});
	self.addChild(u2);
	var u3 = new UpgradeItemContainer('gifts', 'Boost Joy and Laugter', 'Extra christmas gifts', function () {
		self.getGameInstance().placeGift();
	});
	self.updateAll = function () {
		u1._update_migrated();
		u2._update_migrated();
		u3._update_migrated();
	};
	self.addChild(u3);
	u1.y = 530;
	u2.y = u1.y + 320;
	u3.y = u2.y + 320;
	var playButton = self.attachAsset('playButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	pulsate(playButton, 1.05);
	playButton.x = w / 2;
	playButton.y = h - 270;
	self.addChild(playButton);
	playButton.on('down', function () {
		LK.gui.top.visible = true;
		self.getGameInstance().startNextWave();
		self.destroy();
	});
});
var UpgradeItemContainer = Container.expand(function (upgradeType, labelText, infoText, onClickCallback) {
	var self = Container.call(this);
	var bg = self.attachAsset('upgradeItemBg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	bg.width = W_GUI * 0.6;
	bg.height = 265;
	bg.x = W_GUI / 2;
	bg.y = 95;
	self.addChild(bg);
	var text = new Text2(labelText, {
		size: 40,
		fill: '#006600',
		weight: 'bold'
	});
	text.anchor.set(0, 0.5);
	text.x = W_GUI / 2 - bg.width / 2 + 50;
	text.y = 8;
	var textInfo = new Text2(infoText, {
		size: 30,
		fill: '#000000',
		weight: 'bold'
	});
	textInfo.anchor.set(0, 0.5);
	textInfo.x = text.x;
	textInfo.y = text.y + 48;
	var priceText = new Text2('0', {
		size: 50,
		fill: '#000000',
		weight: 'bold',
		align: 'center'
	});
	priceText.anchor.set(0, 0.5);
	self.addChild(textInfo);
	self.addChild(text);
	self.addChild(priceText);
	var button = self.attachAsset('upgradeButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	button.x = W_GUI / 2 + bg.width / 2 - 50;
	button.y = bg.height / 2 - 45;
	pulsate(button, 1.02, 0.001);
	self.addChild(button);
	var dotContainer = new Container();
	var dots = [];
	for (var i = 0; i < 10; i++) {
		var dot = self.attachAsset('dot', {
			anchorX: 0.5,
			anchorY: 1
		});
		dot.x = i * 55;
		dot.scale.x = 3;
		dot.y = 0;
		dots.push(dot);
		dotContainer.addChild(dot);
	}
	dotContainer.x = LK.gui.width / 2 - bg.width / 2 + 70;
	dotContainer.y = bg.height - 70;
	self.addChild(dotContainer);
	var coinSprite = self.attachAsset('coinSprite', {
		anchorY: 0.5
	});
	coinSprite.x = text.x - 2;
	coinSprite.y = text.y + 111;
	priceText.x = coinSprite.x + coinSprite.width + 20;
	priceText.y = coinSprite.y + 2;
	self.addChild(coinSprite);
	button.on('down', function () {
		self.buy();
		onClickCallback(upgradeType);
	});
	var price = basePrice[upgradeType];
	self._update_migrated = function () {
		price = Math.ceil(basePrice[upgradeType] * Math.pow(1.5, upgrades[upgradeType] + 1));
		priceText.setText(price);
		for (var i = 0; i < dots.length; i++) {
			var d = dots[i];
			upgrades[upgradeType] > i ? d.tint = 0x00ee00 : d.tint = 0x555555;
		}
		if (coinAmount < price) {
			button.blendMode = 2;
			button.alpha = 0.5;
		} else {
			button.blendMode = 0;
			alpha = 1;
		}
	};
	self.buy = function () {
		if (coinAmount < price) {
			return;
		}
		coinAmount -= price;
		self.getGameInstance().wallet._update_migrated();
		upgrades[upgradeType]++;
		self.parent.updateAll();
	};
	self._update_migrated();
});
var Wallet = Container.expand(function () {
	var self = Container.call(this);
	self.setCoinText = function (coinCount) {
		self.coinText.setText(coinCount.toString());
	};
	var walletBackground = self.attachAsset('walletBg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var walletForeground = self.attachAsset('walletFg', {
		anchorX: 1,
		anchorY: 0.5
	});
	walletBackground.alpha = 0.5;
	walletForeground.scale.x = walletForeground.scale.y = .7;
	self.init = function () {
		self.x = 1418 - walletBackground.width / 2;
		self.y = 110;
		self.coinText = new Text2('' + coinCount, {
			size: 50,
			weight: 700,
			fill: '#000000',
			align: 'center'
		});
		self.coinText.x = walletForeground.x + 65;
		self.coinText.y = walletForeground.y;
		self.coinText.anchor.set(1, 0.5);
		self.addChild(self.coinText);
		LK.gui.topLeft.addChildAt(self, LK.gui.topLeft.children.length);
	};
	self._update_migrated = function () {
		self.coinText.setText('' + coinAmount);
		LK.gui.topLeft.addChildAt(self, LK.gui.topLeft.children.length);
	};
});
var WaveCounterText = Container.expand(function (level) {
	var self = Container.call(this);
	var text = new Text2('Wave ' + level, {
		size: 250,
		weight: 700,
		fill: "#005500",
		align: 'center'
	});
	text.anchor.set(.5, .5);
	text.x = 2048 / 2 + 100;
	text.y = 2732 / 2;
	self.addChild(text);
	var maxScale = 1.1;
	var minScale = 0.9;
	var scaleStep = 0.005;
	var growing = true;
	self.scale.x = self.scale.y = minScale;
	LK.on('tick', function () {
		if (growing) {
			text.scale.x += scaleStep;
			text.scale.y += scaleStep;
			if (text.scale.x >= maxScale) {
				growing = false;
			}
		} else {
			text.scale.x -= scaleStep;
			text.scale.y -= scaleStep;
			if (text.scale.x <= minScale) {
				growing = true;
			}
		}
	});
	LK.setTimeout(function () {
		var fadeStep = 0.05;
		var fadeInterval = LK.setInterval(function () {
			text.alpha -= fadeStep;
			if (text.alpha <= 0) {
				LK.clearInterval(fadeInterval);
				self.destroy();
			}
		}, 1000 / 60);
	}, 3000);
});
var ZombieKid = Container.expand(function (size) {
	var self = Container.call(this);
	ZombieKid.prototype.startFadeOut = function () {
		var fadeStep = 0.05;
		self.healthBar.visible = false;
		var fadeInterval = LK.setInterval(function () {
			self.alpha -= fadeStep;
			if (self.alpha <= 0) {
				LK.clearInterval(fadeInterval);
				self.shouldBeDestroyed = true;
			}
		}, 1000 / 60);
	};
	self.size = size;
	var zombieKidGraphics;
	switch (self.size) {
		case 1:
			zombieKidGraphics = self.attachAsset('zombieKidSmall', {
				anchorX: 0.5,
				anchorY: 0.8
			});
			break;
		case 2:
			zombieKidGraphics = self.attachAsset('zombieKidMedium', {
				anchorX: 0.5,
				anchorY: 0.8
			});
			break;
		case 3:
			zombieKidGraphics = self.attachAsset('zombieKidLarge', {
				anchorX: 0.5,
				anchorY: 0.8
			});
			break;
		case 4:
			zombieKidGraphics = self.attachAsset('zombieKidXLarge', {
				anchorX: 0.5,
				anchorY: 0.8
			});
			break;
		case 5:
			zombieKidGraphics = self.attachAsset('zombieKidXXLarge', {
				anchorX: 0.5,
				anchorY: 0.8
			});
			break;
		default:
			zombieKidGraphics = self.attachAsset('zombieKid', {
				anchorX: 0.5,
				anchorY: 0.8
			});
	}
	var health = [20, 50, 100, 200, 500][self.size - 1];
	self.healthBar = new HealthBar(health, self.size);
	self.healthBar.y = 80;
	self.healthBar.x = -self.healthBar.width / 2;
	self.addChild(self.healthBar);
	self.speed = (Math.random() * 2 + 1.3) * (1 - (self.size - 1) * 0.1);
	self.hasGift = false;
	self.pickedUpGift = null;
	self.findNewTarget = function () {
		var availableGifts = [];
		var gifts = self.getGameInstance().christmasGifts;
		if (this.parent) {
			availableGifts = gifts.filter(function (g) {
				return !g.isDestroyed && !g.hasBeenPickedUp;
			});
		}
		if (availableGifts.length > 0) {
			var randomIndex = Math.floor(Math.random() * availableGifts.length);
			this.targetGift = availableGifts[randomIndex];
		}
	};
	self._move_migrated = function () {
		if (!self.hasGift) {
			if (self.targetGift) {
				var dx = self.targetGift.x - self.x;
				var dy = self.targetGift.y - self.y;
			} else {
				return self.findNewTarget();
			}
			var angle = Math.atan2(dy, dx);
			var mx = Math.cos(angle) * self.speed;
			if (mx < 0) {
				self.scale.x = -1;
			} else {
				self.scale.x = 1;
			}
			if (mx < 0) {
				self.healthBar.scale.x = -1;
			} else {
				self.healthBar.scale.x = 1;
			}
			if (mx > 0) {
				self.healthBar.x = -self.healthBar.width / 2;
			} else {
				self.healthBar.x = -self.healthBar.width / 2;
			}
			mx += +Math.random() * self.speed;
			self.x += mx;
			self.y += Math.sin(angle) * self.speed + Math.random() * self.speed * .5;
			if (self.targetGift && !self.targetGift.isDestroyed && !self.targetGift.hasBeenPickedUp && Math.abs(self.x - self.targetGift.x) < 10 && Math.abs(self.y - self.targetGift.y + 50) < 50) {
				self.hasGift = true;
				self.exitDirection = Math.random() < .5 ? -1 : 1;
				self.targetGift.hasBeenPickedUp = true;
				self.targetGift.owner = self;
				self.pickedUpGift = self.targetGift;
				if (self.pickedUpGift.parent) {
					self.pickedUpGift.parent.setChildIndex(self.pickedUpGift, self.pickedUpGift.parent.children.length - 1);
				}
			} else if (!self.targetGift || self.targetGift.isDestroyed || self.targetGift.hasBeenPickedUp) {
				self.findNewTarget();
			}
		} else {
			if (self.hasGift && !self.speedIncreased) {
				self.speed *= 1.5;
				self.speedIncreased = true;
			}
			var mx = self.speed * self.exitDirection;
			if (mx < 0) {
				self.scale.x = -1;
			} else {
				self.scale.x = 1;
			}
			if (mx < 0) {
				self.healthBar.scale.x = -1;
			} else {
				self.healthBar.scale.x = 1;
			}
			if (mx > 0) {
				self.healthBar.x = -self.healthBar.width / 2;
			} else {
				self.healthBar.x = -self.healthBar.width / 2;
			}
			self.x += mx;
			self.y -= self.speed * Math.random();
			if (self.pickedUpGift && !self.isDying) {
				self.pickedUpGift.x = self.x;
				self.pickedUpGift.y = self.y + 30;
			}
		}
	};
});

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

/**** 
* Game Code
****/ 
var W_GUI = 1440;
var H_GUI = 1920;
var coinAmount = 0;
var coinCount = 0;
var snowballUpgrades = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var baseStrength = .5;
var upgrades = {
	snowballs: 0,
	strength: 0,
	gifts: 0
};
var basePrice = {
	snowballs: 10,
	strength: 5,
	gifts: 1
};
function pulsate(item, amount, scaleStep) {
	var maxScale = 1 * amount;
	var minScale = 1 / amount;
	var scaleStep = scaleStep || 0.004;
	var growing = true;
	item.scale.x = minScale;
	item.scale.y = minScale;
	LK.on('tick', function () {
		if (growing) {
			item.scale.x += scaleStep;
			item.scale.y += scaleStep;
			if (item.scale.x >= maxScale) {
				growing = false;
			}
		} else {
			item.scale.x -= scaleStep;
			item.scale.y -= scaleStep;
			if (item.scale.x <= minScale) {
				growing = true;
			}
		}
	});
}
;
Container.prototype.getGameInstance = function () {
	var currentParent = this.parent;
	while (currentParent) {
		if (currentParent && currentParent instanceof LK.Game) {
			return currentParent;
		}
		currentParent = currentParent.parent;
	}
	if (currentParent === game) {
		return currentParent;
	}
	if (game && game.children) {
		return game.children.find(function (child) {
			return child instanceof LK.Game;
		});
	}
	return null;
};
var currentLevel = 0;
var zombieKids = [];
var christmasGifts = [];
var levels = [{
	zombieKidSizes: [1, 1, 2]
}, {
	zombieKidSizes: [1, 1, 2, 2]
}, {
	zombieKidSizes: [1, 1, 2, 2, 2, 3]
}, {
	zombieKidSizes: [5]
}, {
	zombieKidSizes: [2, 2, 2, 3, 4]
}, {
	zombieKidSizes: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
}, {
	zombieKidSizes: [1, 1, 2, 2, 3, 3, 4, 4]
}, {
	zombieKidSizes: [5, 5]
}, {
	zombieKidSizes: [1, 1, 2, 2, 3, 3, 4, 4, 5]
}, {
	zombieKidSizes: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
}, {
	zombieKidSizes: [3, 3, 3, 3, 3, 3, 3, 3, 3, 3]
}, {
	zombieKidSizes: [1, 1, 2, 2, 3, 3, 4, 4, 4]
}, {
	zombieKidSizes: [5, 5, 5, 5]
}, {
	zombieKidSizes: [1, 1, 1, 1, 1, 4, 4, 4, 4, 4, 4]
}, {
	zombieKidSizes: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 5, 5]
}, {
	zombieKidSizes: [1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5]
}, {
	zombieKidSizes: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
}, {
	zombieKidSizes: [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3]
}, {
	zombieKidSizes: [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4]
}, {
	zombieKidSizes: [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5]
}, {
	zombieKidSizes: [1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5]
}];
game.spawnSnowParticles = function (snowball, didHit) {
	var splashes = Math.abs(snowball.speedX) + Math.abs(snowball.speedY);
	for (var i = 0; i < Math.max(5, splashes / 5); i++) {
		var particleSplash = new ParticleSplash(didHit);
		particleSplash.x = snowball.x;
		particleSplash.y = snowball.y;
		particleSplash.directionX *= snowball.speedY;
		particleSplash.directionY *= snowball.speedY;
		this.addChild(particleSplash);
	}
};
game.waveInProgress = false;
game.showUpgradeContainer = function () {
	game.waveInProgress = false;
	var upgradeContainer = new UpgradeContainer();
	LK.gui.topLeft.addChild(upgradeContainer);
	game.wallet._update_migrated();
	LK.gui.top.visible = false;
};
var introScreen = new IntroScreen();
LK.gui.topLeft.addChild(introScreen);
LK.gui.top.visible = false;
game.progressBar = new ProgressBar();
zombieKids = [];
game.spawnZombieKids = function () {
	var zombieKidSizes = levels[currentLevel].zombieKidSizes || [];
	var adjustedLength = currentLevel <= 5 ? zombieKidSizes.length : Math.ceil(zombieKidSizes.length * 0.8);
	for (var i = 0; i < adjustedLength; i++) {
		var newZombieKid = new ZombieKid(zombieKidSizes[i]);
		newZombieKid.speed = game.zombieKidSpeed;
		newZombieKid.x = Math.random() * (2448 - newZombieKid.width);
		-200;
		newZombieKid.y = Math.random() * 2000 - 500;
		if (newZombieKid.y > 0) {
			newZombieKid.x = Math.random() < 0.5 ? -200 : 2448;
		}
		zombieKids.push(newZombieKid);
		game.addChild(newZombieKid);
	}
};
game.startNextWave = function () {
	game.wallet.visible = true;
	if (currentLevel < levels.length) {
		var level = levels[currentLevel];
		game.numZombieKids = level.zombieKidSizes.length;
		game.coinFrequency = level.coinFrequency;
		game.zombieKidSpeed = 2 + 0.2 * currentLevel;
		game.spawnZombieKids();
		currentLevel++;
		var waveCounterTxt = new WaveCounterText(currentLevel);
		game.addChild(waveCounterTxt);
		game.waveInProgress = true;
		LK.setTimeout(function () {
			var coin = new Coin();
			coin.init(game.coinLayer);
		}, Math.random() * 5000);
	}
};
var background = game.attachAsset('background', {});
background.width = 2048;
background.height = 2732;
game.isThrowing = false;
game.addChildAt(background, 0);
game.coinLayer = new CoinLayer();
game.addChild(game.coinLayer);
var santa = game.addChild(new Santa());
santa.x = 2048 / 2;
santa.y = 2732 - santa.height / 2 - 170;
var placedGifts = 0;
var tries = 0;
game.placeGift = function () {
	var gift = new ChristmasGift();
	pulsate(gift, 1.03, 0.002);
	var intersects = false;
	for (var j = 0; j < christmasGifts.length; j++) {
		if (gift === christmasGifts[j]) {
			continue;
		}
		if (Math.abs(gift.x - christmasGifts[j].x) < 150 && Math.abs(gift.y - christmasGifts[j].y) < 150) {
			intersects = true;
		}
	}
	if (!intersects) {
		christmasGifts.push(gift);
		game.addChild(gift);
		placedGifts++;
	}
};
while (placedGifts < 10) {
	tries++;
	if (tries > 1000) {
		break;
	}
	game.placeGift();
}
var scoreTxt = new Text2('0', {
	size: 150,
	weight: 700,
	fill: "#000000"
});
game.wallet = new Wallet();
game.wallet.init();
game.wallet.visible = false;
game.coinLayer = new CoinLayer();
game.addChild(game.coinLayer);
scoreTxt.anchor.set(0.5, 0.5);
scoreTxt.x = 0;
scoreTxt.y = 100;
LK.gui.top.addChild(scoreTxt);
game.updateScoreDisplay = function () {
	scoreTxt.setText(LK.getScore().toString());
};
game.updateScoreDisplay();
game.snowballs = [];
var touchStartTime = 0;
game.removeSnowball = function (snowball) {
	var a = game.snowballs.indexOf(snowball);
	if (game.snowballs[a].aim) {
		game.snowballs[a].aim.destroy();
	}
	if (game.snowballs[a].shadow) {
		game.snowballs[a].shadow.destroy();
	}
	game.snowballs.splice(a, 1);
	snowball.destroy();
};
game.showGameOverScreen = function () {
	var gameOverScreen = new GameOverScreen(LK.getScore());
	LK.gui.topLeft.addChild(gameOverScreen);
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 3000);
};
game.spawnAim = function (pos) {
	var aim = new Aim();
	game.currentAim = aim;
	aim.x = pos.x;
	aim.y = pos.y;
	var progress = 0;
	aim.scale.x = aim.scale.y = 0.5 + progress * 0.5;
	game.addChild(aim);
	game.lastAim = aim;
	aim.tweenToAlpha = function (targetAlpha, duration) {
		var step = (1 - targetAlpha) / (duration * 60);
		var fadeInterval = LK.setInterval(function () {
			aim.alpha -= step;
			if (aim.alpha <= targetAlpha) {
				LK.clearInterval(fadeInterval);
				aim.destroy();
			}
		}, 1000 / 60);
	};
	aim.tweenToAlpha(0, 3);
};
game.removeDeadZombieKids = function () {
	for (var i = zombieKids.length - 1; i >= 0; i--) {
		if (zombieKids[i].shouldBeDestroyed) {
			if (zombieKids[i].pickedUpGift) {
				zombieKids[i].pickedUpGift.hasBeenPickedUp = false;
			}
			zombieKids[i].destroy();
			zombieKids.splice(i, 1);
		}
	}
};
game.on('down', function (x, y, obj) {
	touchStartTime = LK.ticks;
	isThrowing = true;
	var event = obj;
	var pos = game.toLocal(event.global);
	game.downPos = pos;
	santa.baseRotation = Math.atan2(pos.y - santa.y, pos.x - santa.x) + Math.PI * 0.6;
	game.aimPosition = pos;
	if (game.snowballs.length < upgrades.snowballs + 2) {
		game.spawnAim(pos);
	}
});
game.on('up', function (x, y, obj) {
	if (game.aim) {
		game.aim.destroy();
		game.aim = null;
	}
	game.progressBar.updateProgress(0);
	santa.rotation = santa.baseRotation;
	isThrowing = false;
	if (game.snowballs.length < upgrades.snowballs + 2 && game.aimPosition) {
		var newSnowball = new Snowball(game.currentAim);
		newSnowball.x = santa.x + 230;
		;
		newSnowball.y = santa.y;
		newSnowball.startX = santa.x + 120;
		newSnowball.startY = santa.y;
		newSnowball.aim = game.currentAim;
		var endPos = game.toLocal(obj.global);
		newSnowball.spinX = game.downPos.x - endPos.x;
		newSnowball.spinY = game.downPos.y - endPos.y;
		var aim = 0.5;
		var missDistance = 300;
		var missX = Math.random() * missDistance - missDistance / 2;
		var missY = Math.random() * missDistance - missDistance / 2;
		newSnowball.targetX = game.aimPosition.x + +missX * aim;
		newSnowball.targetY = game.aimPosition.y + missY * aim;
		;
		newSnowball.init();
		var dx = newSnowball.targetX - newSnowball.x + newSnowball.spinX * 0.5;
		var dy = newSnowball.targetY - newSnowball.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		var throwSpeed = 1.5 + upgrades.strength * 0.3;
		var touchDuration = LK.ticks - touchStartTime;
		touchDuration = Math.min(touchDuration, 30);
		var speedMultiplier = Math.max(touchDuration / 10, 1) * throwSpeed;
		newSnowball.isMaxPower = touchDuration >= 29;
		newSnowball.speedMultiplier = speedMultiplier;
		var aim = 0.5;
		var missDistance = 20;
		var missX = Math.random() * missDistance - missDistance / 2;
		var missY = Math.random() * missDistance - missDistance / 2;
		newSnowball.speedX = -dx / distance * newSnowball.speed * speedMultiplier;
		newSnowball.speedY = -Math.abs(dy / distance * newSnowball.speed) * speedMultiplier;
		game.snowballs.push(newSnowball);
		game.aimPosition = null;
	}
	game.currentAim = null;
});
var christmasGifts = [];
LK.on('tick', function () {
	if (!Array.isArray(game.christmasGifts)) {
		game.christmasGifts = [];
	}
	if (!Array.isArray(game.christmasGifts)) {
		game.christmasGifts = [];
	}
	if (Math.random() < 0.01) {
		console.log("kids");
		console.log(zombieKids);
		console.log("gifts");
	}
	game.removeDeadZombieKids();
	if (touchStartTime > 0 && isThrowing) {
		var progress = Math.min((LK.ticks - touchStartTime) / 30, 1);
		game.progressBar.updateProgress(progress);
		santa.rotation = santa.baseRotation + progress * Math.PI * 2 / 10;
		if (game.aim) {
			game.aim.scale.x = game.aim.scale.y = 0.5 + progressBarGraphics.scale.x * 0.5;
		}
		if (game.currentAim) {
			game.currentAim.scale.x = 0.2 + progress;
			game.currentAim.scale.y = 0.2 + progress;
		}
	}
	for (var a = game.snowballs.length - 1; a >= 0; a--) {
		if (game.snowballs[a]) {
			game.snowballs[a]._move_migrated();
			for (var b = zombieKids.length - 1; b >= 0; b--) {
				if (zombieKids[b] && game.snowballs[a] && game.snowballs[a].intersects(zombieKids[b]) && game.snowballs[a].mayHit) {
					LK.setScore(LK.getScore() + currentLevel);
					coinAmount += 1;
					game.wallet._update_migrated();
					game.updateScoreDisplay();
					game.spawnSnowParticles(game.snowballs[a], true);
					var damage = 20 + (game.snowballs[a].speedMultiplier - 1) * 10;
					if (game.snowballs[a].isMaxPower) {
						var hardHitText = new HardHitText(game.snowballs[a].x, game.snowballs[a].y - 50);
						game.addChild(hardHitText);
					}
					var damageText = new DamageText(damage);
					game.addChild(damageText);
					damageText.init(game.snowballs[a].x, game.snowballs[a].y);
					if (zombieKids[b].hasGift) {
						var droppedGift = zombieKids[b].pickedUpGift;
						droppedGift.x = zombieKids[b].x;
						droppedGift.y = zombieKids[b].y;
						droppedGift.hasBeenPickedUp = false;
					}
					zombieKids[b].healthBar.updateHealth(zombieKids[b].healthBar.currentHealth - damage);
					if (zombieKids[b].healthBar.currentHealth <= 0) {
						zombieKids[b].startFadeOut();
						zombieKids[b].isDying = true;
					}
					game.removeSnowball(game.snowballs[a]);
					break;
				}
			}
			if (game.snowballs[a] && (game.snowballs[a].y < -50 || game.snowballs[a].shouldBeDestroyed)) {
				game.removeSnowball(game.snowballs[a]);
			}
		}
	}
	if (zombieKids.length === 0 && game.waveInProgress && currentLevel > 0) {
		game.waveInProgress = false;
		var victoryTexts = ['Jingle All The Way!', 'Ho-ho-holy Win!', 'Frosty Finish!', 'Sleighed It!', 'Yule Rock!', 'Elf-tastic!', 'Merry Victory!', 'Santa-tastic!', 'Chimney Champion!', 'Ornament Overlord!', 'Sleigh Bell Boss!', 'Mistletoe Master!', 'Holiday Hero!', 'Winter Wizard!', 'Eggnog Emperor!'];
		var randomVictoryText = victoryTexts[Math.floor(Math.random() * victoryTexts.length)];
		var victoryText = new Text2(randomVictoryText, {
			size: 100,
			fill: '#da1c13',
			weight: 'bold',
			align: 'center'
		});
		victoryText.anchor.set(0.5, 0.5);
		victoryText.x = LK.gui.width / 2;
		victoryText.y = LK.gui.height / 2;
		LK.gui.topLeft.addChild(victoryText);
		var fadeStep = 0.005;
		var moveStep = 1;
		var fadeInterval = LK.setInterval(function () {
			victoryText.y -= moveStep;
			victoryText.alpha -= fadeStep;
			if (victoryText.alpha <= 0) {
				LK.clearInterval(fadeInterval);
				victoryText.destroy();
			}
		}, 1000 / 60);
		LK.setTimeout(function () {
			game.showUpgradeContainer();
		}, 2000);
	}
	for (var b = zombieKids.length - 1; b >= 0; b--) {
		if (zombieKids[b]) {
			zombieKids[b]._move_migrated();
		}
	}
	for (var c = game.children.length - 1; c >= 0; c--) {
		if (game.children[c] instanceof ParticleSplash) {
			game.children[c].animate();
		}
	}
	for (var j = 0; j < christmasGifts.length; j++) {
		christmasGifts[j].offScreenHandler();
		if (christmasGifts && christmasGifts[j].flaggedForRemoval) {
			christmasGifts[j].owner.hasGift = false;
			christmasGifts[j].owner.targetGift = false;
			christmasGifts[j].destroy();
			christmasGifts.splice(j, 1);
			if (christmasGifts.length === 0) {
				game.showGameOverScreen();
			}
		}
	}
});

===================================================================
--- original.js
+++ change.js
@@ -773,9 +773,9 @@
 ;
 Container.prototype.getGameInstance = function () {
 	var currentParent = this.parent;
 	while (currentParent) {
-		if (currentParent instanceof LK.Game) {
+		if (currentParent && currentParent instanceof LK.Game) {
 			return currentParent;
 		}
 		currentParent = currentParent.parent;
 	}