===================================================================
--- original.js
+++ change.js
@@ -1,137 +1,61 @@
-var ControlButton = Container.expand(function (label, action) {
+var NinjaShuriken = Container.expand(function () {
 	var self = Container.call(this);
-	var buttonGraphics = self.createAsset('button', label, 0.5, 0.5);
-	buttonGraphics.interactive = true;
-	buttonGraphics.buttonMode = true;
-	self.action = action;
-	buttonGraphics.on('down', function () {
-		self.action();
-	});
-});
-var BossNinjaBullet = Container.expand(function () {
-	var self = Container.call(this);
-	var bulletGraphics = self.createAsset('bossNinjaBullet', 'Boss Ninja Bullet', .5, .5);
+	var shurikenGraphics = self.createAsset('ninjaShuriken', 'Ninja Shuriken', .5, .5);
+	self.speed = 10;
 	self.move = function () {
-		self.y += 7;
+		self.y -= self.speed;
 	};
 });
-var Hero = Container.expand(function () {
+var NinjaHero = Container.expand(function () {
 	var self = Container.call(this);
-	var heroGraphics = self.createAsset('spaceship', 'Hero spaceship', .5, .5);
+	var ninjaGraphics = self.createAsset('ninjaHero', 'Ninja Hero', .5, .5);
+	self.speed = 5;
 	self.move = function (direction) {
-		var speed = 5;
-		switch (direction) {
-			case 'left':
-				if (self.x > 0) self.x -= speed;
-				break;
-			case 'right':
-				if (self.x < 2048 - self.width) self.x += speed;
-				break;
-			case 'up':
-				if (self.y > 0) self.y -= speed;
-				break;
-			case 'down':
-				if (self.y < 2732 - self.height) self.y += speed;
-				break;
-		}
+		if (direction === 'left' && self.x > 0) self.x -= self.speed; else if (direction === 'right' && self.x < 2048 - self.width) self.x += self.speed; else if (direction === 'up' && self.y > 0) self.y -= self.speed; else if (direction === 'down' && self.y < 2732 - self.height) self.y += self.speed;
 	};
-	self.attack = function () {
-		var bullet = new HeroBullet();
-		bullet.x = self.x;
-		bullet.y = self.y - self.height / 2;
-		self.parent.heroBullets.push(bullet);
-		self.parent.addChild(bullet);
+	self.throwShuriken = function () {
+		var shuriken = new NinjaShuriken();
+		shuriken.x = self.x;
+		shuriken.y = self.y - self.height / 2;
+		self.parent.ninjaShurikens.push(shuriken);
+		self.parent.addChild(shuriken);
 	};
 });
-var Boss = Container.expand(function () {
+var NinjaStar = Container.expand(function () {
 	var self = Container.call(this);
-	var bossGraphics = self.createAsset('boss', 'Boss character', .5, .5);
-	self.health = 100;
+	var starGraphics = self.createAsset('ninjaStar', 'Ninja Star', .5, .5);
+	self.speed = 15;
 	self.move = function () {
-		var speed = 3;
-		self.x += speed * (self.x < 1024 ? 1 : -1);
-		self.y += speed * (self.y < 1366 ? 1 : -1);
-		self.x = Math.max(self.width / 2, Math.min(self.x, 2048 - self.width / 2));
-		self.y = Math.max(self.height / 2, Math.min(self.y, 2732 - self.height / 2));
+		self.y -= self.speed;
 	};
-	self.attack = function () {
-		var ninjaBullet = new BossNinjaBullet();
-		ninjaBullet.x = self.x;
-		ninjaBullet.y = self.y + self.height / 2;
-		self.parent.bossBullets.push(ninjaBullet);
-		self.parent.addChild(ninjaBullet);
-	};
 });
-var HeroBullet = Container.expand(function () {
-	var self = Container.call(this);
-	var bulletGraphics = self.createAsset('heroBullet', 'Hero Bullet', .5, .5);
-	self.move = function () {
-		self.y -= 10;
-	};
-});
-var BossBullet = Container.expand(function () {
-	var self = Container.call(this);
-	var bulletGraphics = self.createAsset('bossBullet', 'Boss Bullet', .5, .5);
-	self.move = function () {
-		self.y += 7;
-	};
-});
 var Game = Container.expand(function () {
 	var self = Container.call(this);
-	var spaceBackground = self.createAsset('space', 'Space background', 0, 0);
-	spaceBackground.width = 2048;
-	spaceBackground.height = 2732;
-	self.addChildAt(spaceBackground, 0);
-	var hero = self.addChild(new Hero());
-	var boss = self.addChild(new Boss());
-	hero.x = 2048 / 2;
-	hero.y = 2732 - hero.height;
-	boss.x = 2048 / 2;
-	boss.y = boss.height;
-	this.heroBullets = [];
-	this.bossBullets = [];
+	var ninjaHero = self.addChild(new NinjaHero());
+	ninjaHero.x = 2048 / 2;
+	ninjaHero.y = 2732 - ninjaHero.height;
+	this.ninjaShurikens = [];
+	this.ninjaStars = [];
 	self.on('down', function (obj) {
 		var event = obj.event;
 		var pos = event.getLocalPosition(self);
-		hero.x = pos.x;
-		hero.y = pos.y;
+		ninjaHero.x = pos.x;
+		ninjaHero.y = pos.y;
 	});
 	LK.on('tick', function () {
-		if (LK.ticks % 120 == 0) {
-			boss.attack();
-		}
-	});
-	LK.on('tick', function () {
-		for (var i = self.heroBullets.length - 1; i >= 0; i--) {
-			self.heroBullets[i].move();
-			if (self.heroBullets[i].y < -50) {
-				self.heroBullets[i].destroy();
-				self.heroBullets.splice(i, 1);
+		for (var i = self.ninjaShurikens.length - 1; i >= 0; i--) {
+			self.ninjaShurikens[i].move();
+			if (self.ninjaShurikens[i].y < -50) {
+				self.ninjaShurikens[i].destroy();
+				self.ninjaShurikens.splice(i, 1);
 			}
 		}
-		for (var i = self.bossBullets.length - 1; i >= 0; i--) {
-			self.bossBullets[i].move();
-			if (self.bossBullets[i].y > 2732 + 50) {
-				self.bossBullets[i].destroy();
-				self.bossBullets.splice(i, 1);
+		for (var i = self.ninjaStars.length - 1; i >= 0; i--) {
+			self.ninjaStars[i].move();
+			if (self.ninjaStars[i].y < -50) {
+				self.ninjaStars[i].destroy();
+				self.ninjaStars.splice(i, 1);
 			}
 		}
 	});
-	LK.on('tick', function () {
-		for (var i = self.heroBullets.length - 1; i >= 0; i--) {
-			if (self.heroBullets[i].intersects(boss)) {
-				boss.health -= 10;
-				self.heroBullets[i].destroy();
-				self.heroBullets.splice(i, 1);
-				if (boss.health <= 0) {
-					LK.showGameOver();
-				}
-			}
-		}
-		for (var i = self.bossBullets.length - 1; i >= 0; i--) {
-			if (self.bossBullets[i].intersects(hero)) {
-				LK.showGameOver();
-			}
-		}
-	});
 });