var BloodSplatter = Container.expand(function () {
	var self = Container.call(this);
	var splatterGraphics = self.createAsset('bloodSplatter', 'Blood Splatter', .5, .5);
	self.lifetime = 0.2;
	LK.setTimeout(function () {
		self.destroy();
	}, self.lifetime * 1000);
});
var HealingPickup = Container.expand(function () {
	var self = Container.call(this);
	var pickupGraphics = self.createAsset('healingPickup', 'Healing Pickup', .5, .5);
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('bullet', 'Bullet Graphics', .5, .5);
	self.speed = 30;
	self.travelDistance = 800;
	self.move = function () {
		self.x += self.speed * Math.cos(self.angle);
		self.y += self.speed * Math.sin(self.angle);
		self.rotation += 0.2;
		if (self.travelDistance > 0) {
			self.travelDistance -= self.speed;
		} else if (self.speed > -30) {
			self.speed -= 0.75;
		}
	};
});
var Enemy = Container.expand(function (hero) {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('enemy', 'Enemy character', .5, .5);
	self.creationTick = LK.ticks;
	self.move = function () {
		var dx = hero.x - self.x;
		var dy = hero.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 50) {
			self.x += dx / distance * 1.8;
			self.y += dy / distance * 1.8 + Math.sin((LK.ticks - self.creationTick) / 10) * 2;
		}
	};
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.createAsset('hero', 'Hero character', .5, .5);
	self.health = 100;
	self.healthBarBorder = self.createAsset('healthBarBorder', 'Health Bar Border', 0.5, 1);
	self.healthBarBorder.y = -115;
	self.healthBar = self.createAsset('healthBar', 'Health Bar', 0.5, 1);
	self.healthBar.y = -120;
	self.healthBarBorder.x = self.healthBar.x;
	self.healthBarBorder.width = self.healthBar.width + 10;
	self.healthBarBorder.height = self.healthBar.height + 10;
	self.move = function () {
		self.healthBar.scale.x = self.health / 100;
		if (self.targetPos) {
			var dx = self.targetPos.x - self.x;
			var dy = self.targetPos.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > 5) {
				self.x += dx / distance * 10;
				self.y += dy / distance * 10;
			} else {
				self.x = self.targetPos.x;
				self.y = self.targetPos.y;
				self.targetPos = null;
			}
		}
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var isPaused = true;
	var grass = self.createAsset('grass', 'Grass Background', 0, 0);
	grass.width = 2048;
	grass.height = 2732;
	self.addChild(grass);
	var hero = new Hero();
	var canMove = false;
	var score = 0;
	var scoreTxt = new Text2('Score: ' + score, {
		size: 150,
		fill: '#ffffff'
	});
	LK.gui.topCenter.addChild(scoreTxt);
	var heroBullets = [];
	var enemyBullets = [];
	var enemies = [];
	hero.x = 2048 / 2;
	hero.y = 2732 / 2;
	self.targetPos = null;
	stage.on('down', function (obj) {
		canMove = true;
	});
	stage.on('up', function (obj) {
		canMove = false;
		hero.targetPos = null;
	});
	var shootPos = null;
	stage.on('move', function (obj) {
		if (canMove) {
			hero.targetPos = obj.event.getLocalPosition(self);
		}
		shootPos = obj.event.getLocalPosition(self);
	});
	self.addChild(hero);
	var spawnEnemy = function () {
		var side = Math.floor(Math.random() * 4);
		var enemy = new Enemy(hero);
		switch (side) {
			case 0:
				enemy.x = Math.random() * 2048;
				enemy.y = 0;
				break;
			case 1:
				enemy.x = 2048;
				enemy.y = Math.random() * 2732;
				break;
			case 2:
				enemy.x = Math.random() * 2048;
				enemy.y = 2732;
				break;
			case 3:
				enemy.x = 0;
				enemy.y = Math.random() * 2732;
				break;
		}
		enemies.push(enemy);
		self.addChild(enemy);
	};
	LK.on('tick', function () {
		if (!isPaused) {
			hero.move();
			for (var i = 0; i < heroBullets.length; i++) {
				heroBullets[i].move();
				if (heroBullets[i].x < 0 || heroBullets[i].x > 2048 || heroBullets[i].y < 0 || heroBullets[i].y > 2732) {
					heroBullets[i].destroy();
					heroBullets.splice(i, 1);
					i--;
				}
			}
			for (var i = 0; i < enemyBullets.length; i++) {
				enemyBullets[i].move();
			}
			for (var i = 0; i < enemies.length; i++) {
				enemies[i].move();
				for (var j = 0; j < heroBullets.length; j++) {
					if (heroBullets[j].intersects(enemies[i])) {
						if (Math.random() < 0.1) {
							var pickup = new HealingPickup();
							pickup.x = enemies[i].x;
							pickup.y = enemies[i].y;
							self.addChild(pickup);
						}
						heroBullets[j].destroy();
						heroBullets.splice(j, 1);
						var bloodSplatter = new BloodSplatter();
						bloodSplatter.x = enemies[i].x;
						bloodSplatter.y = enemies[i].y;
						self.addChild(bloodSplatter);
						enemies[i].destroy();
						enemies.splice(i, 1);
						score++;
						scoreTxt.setText('Score: ' + score);
						i--;
						j--;
					}
				}
				if (hero.intersects(enemies[i])) {
					hero.health -= 1;
					if (hero.health <= 0) {
						LK.showGameOver();
					}
				}
			}
			for (var i = 0; i < self.children.length; i++) {
				if (self.children[i] instanceof HealingPickup && hero.intersects(self.children[i])) {
					hero.health = Math.min(100, hero.health + 10);
					self.children[i].destroy();
				}
			}
			if (LK.ticks % Math.max(10, 30 - Math.floor(score / 10)) === 0) {
				spawnEnemy();
			}
			if (LK.ticks % 20 === 0 && shootPos) {
				var bullet = new Bullet();
				bullet.x = hero.x;
				bullet.y = hero.y;
				var dx = shootPos.x - hero.x;
				var dy = shootPos.y - hero.y;
				bullet.angle = Math.atan2(dy, dx);
				heroBullets.push(bullet);
				self.addChild(bullet);
			}
		}
	});
});

===================================================================
--- original.js
+++ change.js
@@ -71,21 +71,8 @@
 var Game = Container.expand(function () {
 	var self = Container.call(this);
 	var isPaused = true;
 	var grass = self.createAsset('grass', 'Grass Background', 0, 0);
-	var popup = LK.getAsset('popup', 'Game Instructions Popup', 0.5, 0.5);
-	LK.gui.center.addChild(popup);
-	var welcomeText = new Text2('Welcome', {
-		size: 150,
-		fill: '#ffffff'
-	});
-	popup.addChild(welcomeText);
-	welcomeText.y = -popup.height / 2 + welcomeText.height;
-	var playButton = popup.addChild(LK.getAsset('playButton', 'Play Button', 0.5, 0.5));
-	playButton.on('down', function () {
-		isPaused = false;
-		popup.destroy();
-	});
 	grass.width = 2048;
 	grass.height = 2732;
 	self.addChild(grass);
 	var hero = new Hero();