var nameStorage = ['James', 'Mary', 'John', 'Patricia', 'Robert', 'Jennifer', 'Michael', 'Linda', 'William', 'Elizabeth', 'David', 'Barbara', 'Richard', 'Susan', 'Joseph', 'Jessica', 'Thomas', 'Sarah', 'Charles', 'Karen', 'Christopher', 'Nancy', 'Daniel', 'Lisa', 'Matthew', 'Margaret', 'Anthony', 'Betty', 'Mark', 'Sandra', 'Donald', 'Ashley', 'Steven', 'Kimberly', 'Paul', 'Emily', 'Andrew', 'Donna', 'Joshua', 'Michelle', 'Kenneth', 'Dorothy', 'Kevin', 'Carol', 'Brian', 'Amanda', 'George', 'Melissa', 'Edward', 'Stephanie'];
var LevelManager = (function () {
	var currentLevel = 1;
	var maxLevel = 16;
	function getNextLevel() {
		currentLevel++;
		return currentLevel;
	}
	function resetLevels() {
		currentLevel = 1;
	}
	return {
		getNextLevel: getNextLevel,
		resetLevels: resetLevels,
		getCurrentLevel: function () {
			return currentLevel;
		}
	};
})();
var levelParameters = [{
	presentSpeedFactor: 2,
	bounceFactor: 0.6,
	gravity: 0.1
}, {
	presentSpeedFactor: 2.2,
	bounceFactor: 0.65,
	gravity: 0.12
}, {
	presentSpeedFactor: 3,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 4,
	bounceFactor: 0.8,
	gravity: 0.3
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}, {
	presentSpeedFactor: 3.5,
	bounceFactor: 0.8,
	gravity: 0.2
}];
var BonusItem = Container.expand(function () {
	var self = Container.call(this);
	self.speed = Math.random() * 7 + 1;
	self.rotationSpeed = (Math.random() - 0.5) * 0.1;
	self.bounce = Math.random() * 0.5 + 0.5;
	self.gravity = Math.random() * 0.1 + 0.05;
	self.vx = (Math.random() > 0.5 ? 1 : -1) * self.speed;
	self.vy = (Math.random() > 0.5 ? 1 : -1) * self.speed;
	BonusItem.prototype.startDestructionTimer = function (resetBonusTimerCallback) {
		var self = this;
		LK.setTimeout(function () {
			self.destroy();
			resetBonusTimerCallback();
		}, 20000);
	};
	self.interactive = true;
	self.bonusAmount = Math.floor(Math.random() * (10 - 4 + 1)) + 4;
	var bonusGraphics = self.createAsset('bonusItem', 'Bonus Item Graphics', 0.5, 0.5);
	self.vx = (Math.random() > 0.5 ? 1 : -1) * (Math.random() * 2 + 1);
	self.on('down', function () {
		var gameInstance = this.parent.parent;
		gameInstance.score += self.bonusAmount;
		var scoreTxt = LK.gui.topCenter.children[0];
		scoreTxt.setText(gameInstance.score);
		self.destroy();
		gameInstance.resetBonusTimer();
	});
	self.move = function () {
		self.x += self.vx;
		self.y += self.vy;
		self.rotation += self.rotationSpeed;
		if (self.x < 0 || self.x > 2048) {
			self.vx = -self.vx * self.bounce;
		}
		if (self.y < 0 || self.y > 2732) {
			self.vy = -self.vy * self.bounce;
		}
	};
});
var LifeCounter = Container.expand(function (initialLives) {
	var self = Container.call(this);
	self.refreshLifeDisplay = function () {
		while (self.lifeIcons.length > self.lives) {
			var lifeToRemove = self.lifeIcons.pop();
			lifeToRemove.destroy();
		}
		for (var i = 0; i < self.lifeIcons.length; i++) {
			self.lifeIcons[i].x = 1948 - i * (self.lifeIcons[i].width + 10);
		}
	};
	self.lives = initialLives;
	self.lifeIcons = [];
	for (var i = 0; i < self.lives; i++) {
		var lifeIcon = self.createAsset('lifeIcon', 'Life Icon', 0.5, 0.5);
		lifeIcon.x = 1948 - i * (lifeIcon.width + 10);
		lifeIcon.y = 250;
		self.lifeIcons.push(lifeIcon);
		self.addChild(lifeIcon);
	}
	self.removeLife = function () {
		if (self.lives > 0) {
			self.lives--;
			self.refreshLifeDisplay();
			if (self.lives <= 0) {
				LK.showGameOver();
			}
		}
	};
	self.resetLives = function () {
		while (self.lifeIcons.length < initialLives) {
			var lifeIcon = self.createAsset('lifeIcon', 'Life Icon', 0.5, 0.5);
			lifeIcon.x = 1948 - (initialLives - self.lifeIcons.length - 1) * (lifeIcon.width + 10);
			lifeIcon.y = 250;
			self.lifeIcons.push(lifeIcon);
			self.addChild(lifeIcon);
		}
		self.lives = initialLives;
	};
});
var NameDisplay = Container.expand(function () {
	var self = Container.call(this);
	self.nameText = new Text2('', {
		size: 40,
		fill: "#000000",
		Font: "Trebuchet MS",
		anchor: {
			x: 0.5,
			y: 0.5
		}
	});
	self.nameText.x = 270;
	self.nameText.y = 130;
	LK.gui.addChild(self.nameText);
	self.updateName = function (name) {
		self.nameText.setText(name);
	};
});
var Background = Container.expand(function () {
	var self = Container.call(this);
	var background = self.createAsset('background', 'Background Image', 0, 0);
	background.width = 2048;
	background.height = 2732;
	self.addChild(background);
});
var RotatingBackground = Container.expand(function () {
	var self = Container.call(this);
	var rotatingImage = self.createAsset('rotatingBackground', 'Rotating Background Image', 0.5, 0.5);
	rotatingImage.x = 2048 / 2;
	rotatingImage.y = 2732 / 2;
	self.addChild(rotatingImage);
	self.rotationSpeed = 0.0003;
});
var presentTypeDisplay = Container.expand(function (nameDisplay) {
	var self = Container.call(this);
	var level = LevelManager.getCurrentLevel();
	var presentTypesCount = 2;
	if (level >= 5 && level <= 8) {
		presentTypesCount = 4;
	} else if (level >= 9 && level <= 12) {
		presentTypesCount = 6;
	} else if (level >= 13) {
		presentTypesCount = 8;
	}
	var presentTypes = [];
	for (var i = 0; i < presentTypesCount; i++) {
		presentTypes.push('presentType' + (i + 1));
	}
	self.currentPresentType = '';
	self.getCurrentPresentType = function () {
		return self.currentPresentType;
	};
	self.setRandomPresentTypeIndex = function () {
		var presentTypeIndex = Math.floor(Math.random() * presentTypesCount);
		self.currentPresentType = presentTypes[presentTypeIndex];
		var displayGraphic = self.createAsset(self.currentPresentType, self.currentPresentType + ' Graphics', -0.2, -0.2);
		displayGraphic.scale.x = 1.5;
		displayGraphic.scale.y = 1.5;
		if (self.children.length > 0) {
			self.removeChildAt(0);
		}
		self.addChild(displayGraphic);
		var randomName = nameStorage[Math.floor(Math.random() * nameStorage.length)];
		nameDisplay.updateName(randomName);
	};
	self.setRandomPresentTypeIndex();
	LK.setInterval(self.setRandomPresentTypeIndex, (Math.random() * (9 - 3) + 3) * 1000);
});
var Present = Container.expand(function (type) {
	var self = Container.call(this);
	self.type = type;
	self.applyGravity = function () {
		var level = LevelManager.getCurrentLevel() - 1;
		var gravity = levelParameters[level].gravity;
		self.vy += gravity;
	};
	var presentGraphics = self.createAsset(type, type + ' Graphics', .5, .5);
	self.vx = (Math.random() - 0.5) * 10;
	self.vy = (Math.random() - 0.5) * 10;
	self.rotationSpeed = (Math.random() - 0.5) * 0.2;
	self.interactive = true;
	self.on('down', function () {
		var gameInstance = this.parent.parent;
		var currentDisplayType = gameInstance.getCurrentPresentType();
		if (self.type === currentDisplayType) {
			gameInstance.score++;
			var scoreTxt = LK.gui.topCenter.children[0];
			scoreTxt.setText(gameInstance.score);
			var gameInstance = this.parent.parent;
			gameInstance.presents.splice(gameInstance.presents.indexOf(self), 1);
			self.destroy();
		} else {
			gameInstance.lifeCounter.removeLife();
		}
	});
	self.move = function () {
		self.applyMovement();
	};
	self.applyMovement = function () {
		var levelIndex = LevelManager.getCurrentLevel() - 1;
		var level = levelParameters[Math.max(0, Math.min(levelIndex, levelParameters.length - 1))];
		var presentSpeedFactor = level.presentSpeedFactor;
		self.x += self.vx * presentSpeedFactor;
		self.y += self.vy * presentSpeedFactor;
		self.rotation += self.rotationSpeed;
		self.applyBounds();
	};
	self.applyBounds = function () {
		var mainContainer = self.parent;
		if (self.x < 0) {
			self.x = 0;
			self.vx = -self.vx;
		}
		if (mainContainer && self.x > mainContainer.width - self.width) {
			self.x = mainContainer.width - self.width;
			self.vx = -self.vx;
		}
		if (self.y < 0) {
			self.y = 0;
			self.vy = -self.vy;
		}
		if (mainContainer && self.y > mainContainer.height - self.height) {
			self.y = mainContainer.height - self.height;
			self.vy = -self.vy;
		}
	};
	self.bounce = function (collisionNormal) {
		self.applyBounce(collisionNormal);
	};
	self.applyBounce = function (collisionNormal) {
		var level = LevelManager.getCurrentLevel() - 1;
		var bounceFactor = levelParameters[level].bounceFactor;
		if (collisionNormal.x !== 0) {
			self.vx = -self.vx * bounceFactor;
		}
		if (collisionNormal.y !== 0) {
			self.vy = -self.vy * bounceFactor;
		}
	};
});
var MainContainer = Container.expand(function () {
	var self = Container.call(this);
	self.width = 1942;
	self.height = 1900;
	self.x = 50;
	self.y = 400;
	var background = self.createAsset('whiteBackground', 'White Background', 0, 0);
	background.width = self.width;
	background.height = self.height;
	background.alpha = 0.01;
	self.addChild(background);
});
var SantaSack = Container.expand(function () {
	var self = Container.call(this);
	this.sackGraphics = self.createAsset('santaSack', 'Santa Toy Sack', 0.5, 1);
	self.x = 2048 / 2;
	self.y = 3200;
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	self.createBonusItem = function (mainContainer) {
		var bonusItem = new BonusItem();
		bonusItem.x = Math.random() * (mainContainer.width - bonusItem.width) + mainContainer.x;
		bonusItem.y = Math.random() * (mainContainer.height - bonusItem.height) + mainContainer.y;
		mainContainer.addChild(bonusItem);
		bonusItem.startDestructionTimer(self.resetBonusTimer);
		self.bonusItem = bonusItem;
	};
	self.resetBonusTimer = function () {
		LK.clearTimeout(bonusItemTimeout);
		bonusItemTimeout = LK.setTimeout(function () {
			self.createBonusItem(mainContainer);
		}, (Math.random() * (120 - 60) + 60) * 1000);
	};
	var bonusItemTimeout = LK.setTimeout(function () {
		self.createBonusItem(mainContainer);
	}, (Math.random() * (120 - 60) + 60) * 1000);
	LK.on('tick', function () {
		if (self.bonusItem) {
			self.bonusItem.move();
		}
	});
	var self = Container.call(this);
	self.presents = [];
	self.levelManager = LevelManager;
	var rotatingBackground = new RotatingBackground();
	self.addChild(rotatingBackground, 0);
	LK.on('tick', function () {
		rotatingBackground.children[0].rotation += rotatingBackground.rotationSpeed;
	});
	var background = new Background();
	self.addChildAt(background, 1);
	var mainContainer = new MainContainer();
	self.addChild(mainContainer);
	var scroll = self.createAsset('newImageAsset', 'Scroll', 0.5, 0.5);
	scroll.x = 500;
	scroll.y = 220;
	self.addChild(scroll);
	var nameDisplay = new NameDisplay();
	var presentDisplay = self.addChild(new presentTypeDisplay(nameDisplay));
	self.presentDisplay = presentDisplay;
	self.getCurrentPresentType = function () {
		return self.presentDisplay.getCurrentPresentType();
	};
	self.presentDisplay.x = 0;
	self.presentDisplay.y = 0;
	var santaSack = new SantaSack();
	self.addChild(santaSack);
	self.lifeCounter = new LifeCounter(5);
	self.addChild(self.lifeCounter);
	self.score = 0;
	var score = self.score;
	var scoreTxt = new Text2(score, {
		size: 120,
		fill: "#ffffff",
		weight: 800,
		dropShadow: true,
		dropShadowColor: '#ff0000',
		dropShadowAngle: Math.PI / 6,
		dropShadowDistance: 5
	});
	self.currentLevelTxt = new Text2('LV' + self.levelManager.getCurrentLevel(), {
		size: 60,
		fill: "#ffffff",
		weight: 800,
		dropShadow: true,
		dropShadowColor: '#000000',
		dropShadowAngle: Math.PI / 6,
		dropShadowDistance: 3
	});
	self.currentLevelTxt.anchor.set(0.5, 0);
	self.currentLevelTxt.x = 1224;
	self.currentLevelTxt.y = 50;
	LK.gui.addChild(self.currentLevelTxt);
	scoreTxt.anchor.set(0.5, 1);
	scoreTxt.x = 2048 / 2;
	scoreTxt.y = 3200 - santaSack.sackGraphics.height / 2;
	LK.gui.addChild(scoreTxt);
	var level = self.levelManager.getCurrentLevel();
	var presentTypesCount = 2;
	if (level >= 5 && level <= 8) {
		presentTypesCount = 4;
	} else if (level >= 9 && level <= 12) {
		presentTypesCount = 6;
	} else if (level >= 13) {
		presentTypesCount = 8;
	}
	self.createPresents = function (presentTypesCount, mainContainer) {
		for (var i = 0; i < presentTypesCount; i++) {
			var numPresentsToCreate = 6;
			for (var j = 0; j < numPresentsToCreate; j++) {
				var presentType = new Present('presentType' + (i + 1));
				presentType.x = Math.random() * (mainContainer.width - presentType.width);
				presentType.y = Math.random() * (mainContainer.height - presentType.height);
				mainContainer.addChild(presentType);
				self.presents.push(presentType);
			}
		}
	};
	self.createPresents(presentTypesCount, mainContainer);
	LK.on('tick', function () {
		for (var i = self.presents.length - 1; i >= 0; i--) {
			var present = self.presents[i];
			present.move();
			if (present.y >= LK.stageContainer.height - present.height) {
				present.y = LK.stageContainer.height - present.height;
				present.vy = 0;
				present.destroy();
				self.presents.splice(i, 1);
			}
		}
		if (self.presents.length === 0) {
			var newLevel = self.levelManager.getNextLevel();
			self.currentLevelTxt.setText('LV ' + newLevel);
			var level = self.levelManager.getCurrentLevel();
			var presentTypesCount = 2;
			if (level >= 5 && level <= 8) {
				presentTypesCount = 4;
			} else if (level >= 9 && level <= 12) {
				presentTypesCount = 6;
			} else if (level >= 13) {
				presentTypesCount = 8;
			}
			self.createPresents(presentTypesCount, mainContainer);
		}
	});
});

===================================================================
--- original.js
+++ change.js
@@ -314,9 +314,9 @@
 	self.addChild(background);
 });
 var SantaSack = Container.expand(function () {
 	var self = Container.call(this);
-	var sackGraphics = self.createAsset('santaSack', 'Santa Toy Sack', 0.5, 1);
+	this.sackGraphics = self.createAsset('santaSack', 'Santa Toy Sack', 0.5, 1);
 	self.x = 2048 / 2;
 	self.y = 3200;
 });
 var Game = Container.expand(function () {
@@ -396,9 +396,9 @@
 	self.currentLevelTxt.y = 50;
 	LK.gui.addChild(self.currentLevelTxt);
 	scoreTxt.anchor.set(0.5, 1);
 	scoreTxt.x = 2048 / 2;
-	scoreTxt.y = 3200 - sackGraphics.height / 2;
+	scoreTxt.y = 3200 - santaSack.sackGraphics.height / 2;
 	LK.gui.addChild(scoreTxt);
 	var level = self.levelManager.getCurrentLevel();
 	var presentTypesCount = 2;
 	if (level >= 5 && level <= 8) {