===================================================================
--- original.js
+++ change.js
@@ -1,74 +1,78 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Enemy class
 var Enemy = Container.expand(function () {
-  var self = Container.call(this);
-  var enemyGraphics = self.attachAsset('enemy', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 2;
-  self.move = function () {
-    self.y += self.speed;
-  };
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 2;
+	self.move = function () {
+		self.y += self.speed;
+	};
 });
 // EnemyBullet class
 var EnemyBullet = Container.expand(function () {
-  var self = Container.call(this);
-  var bulletGraphics = self.attachAsset('enemyBullet', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 5;
-  self.move = function () {
-    self.y += self.speed;
-  };
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('enemyBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.move = function () {
+		self.y += self.speed;
+	};
 });
 // Assets will be automatically generated based on usage in the code.
 // Hero class
 var Hero = Container.expand(function () {
-  var self = Container.call(this);
-  var heroGraphics = self.attachAsset('hero', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.move = function (x, y) {
-    self.x = x;
-    self.y = y;
-  };
-  self.shoot = function () {
-    var bullet = new HeroBullet();
-    bullet.x = self.x;
-    bullet.y = self.y - 50; // Shoot from above the hero
-    game.addChild(bullet);
-    heroBullets.push(bullet);
-  };
+	var self = Container.call(this);
+	var heroGraphics = self.attachAsset('hero', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 2,
+		scaleY: 2
+	});
+	heroGraphics.tint = 0xFF69B4;
+	self.move = function (x, y) {
+		self.x = x;
+		self.y = y;
+	};
+	self.shoot = function () {
+		var bullet = new HeroBullet();
+		bullet.x = self.x;
+		bullet.y = self.y - 50; // Shoot from above the hero
+		game.addChild(bullet);
+		heroBullets.push(bullet);
+	};
 });
 // HeroBullet class
 var HeroBullet = Container.expand(function () {
-  var self = Container.call(this);
-  var bulletGraphics = self.attachAsset('heroBullet', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = -10;
-  self.move = function () {
-    self.y += self.speed;
-  };
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('heroBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	bulletGraphics.tint = 0x90EE90;
+	self.speed = -10;
+	self.move = function () {
+		self.y += self.speed;
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 // Init game with black background 
+	backgroundColor: 0x000000 // Init game with black background 
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Global variables
 var hero = new Hero();
 hero.x = 1024; // Center horizontally
 hero.y = 2500; // Near the bottom
@@ -78,56 +82,68 @@
 // Add hero to the game
 game.addChild(hero);
 // Touch event to move hero and shoot
 game.on('down', function (obj) {
-  var pos = obj.event.getLocalPosition(game);
-  hero.move(pos.x, pos.y);
-  hero.shoot();
+	var pos = obj.event.getLocalPosition(game);
+	hero.move(pos.x, pos.y);
+	hero.shoot();
 });
 // Game tick event
 LK.on('tick', function () {
-  // Move hero bullets
-  for (var i = heroBullets.length - 1; i >= 0; i--) {
-    heroBullets[i].move();
-    if (heroBullets[i].y < 0) {
-      // Bullet off-screen
-      heroBullets[i].destroy();
-      heroBullets.splice(i, 1);
-    }
-  }
-  // Move enemies and enemy bullets
-  for (var j = enemies.length - 1; j >= 0; j--) {
-    enemies[j].move();
-    if (enemies[j].y > 2732) {
-      // Enemy off-screen
-      enemies[j].destroy();
-      enemies.splice(j, 1);
-    }
-  }
-  for (var k = enemyBullets.length - 1; k >= 0; k--) {
-    enemyBullets[k].move();
-    if (enemyBullets[k].y > 2732) {
-      // Bullet off-screen
-      enemyBullets[k].destroy();
-      enemyBullets.splice(k, 1);
-    }
-    // Check collision with hero
-    if (hero.intersects(enemyBullets[k])) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-    }
-  }
-  // Spawn enemies and bullets
-  if (LK.ticks % 120 == 0) {
-    // Every 2 seconds
-    var enemy = new Enemy();
-    enemy.x = Math.random() * 2048;
-    enemy.y = 0;
-    game.addChild(enemy);
-    enemies.push(enemy);
-    var enemyBullet = new EnemyBullet();
-    enemyBullet.x = enemy.x;
-    enemyBullet.y = enemy.y + 50;
-    game.addChild(enemyBullet);
-    enemyBullets.push(enemyBullet);
-  }
+	// Move hero bullets
+	for (var i = heroBullets.length - 1; i >= 0; i--) {
+		heroBullets[i].move();
+		if (heroBullets[i].y < 0) {
+			// Bullet off-screen
+			heroBullets[i].destroy();
+			heroBullets.splice(i, 1);
+		}
+	}
+	// Move enemies and enemy bullets
+	for (var j = enemies.length - 1; j >= 0; j--) {
+		enemies[j].move();
+		if (enemies[j].y > 2732) {
+			// Enemy off-screen
+			enemies[j].destroy();
+			enemies.splice(j, 1);
+		}
+	}
+	for (var k = enemyBullets.length - 1; k >= 0; k--) {
+		enemyBullets[k].move();
+		if (enemyBullets[k].y > 2732) {
+			// Bullet off-screen
+			enemyBullets[k].destroy();
+			enemyBullets.splice(k, 1);
+		}
+		// Check collision with hero
+		if (hero.intersects(enemyBullets[k])) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+		}
+		// Check collision between hero bullets and enemies
+		for (var i = heroBullets.length - 1; i >= 0; i--) {
+			for (var j = enemies.length - 1; j >= 0; j--) {
+				if (heroBullets[i].intersects(enemies[j])) {
+					enemies[j].destroy();
+					enemies.splice(j, 1);
+					heroBullets[i].destroy();
+					heroBullets.splice(i, 1);
+					break;
+				}
+			}
+		}
+	}
+	// Spawn enemies and bullets
+	if (LK.ticks % 120 == 0) {
+		// Every 2 seconds
+		var enemy = new Enemy();
+		enemy.x = Math.random() * 2048;
+		enemy.y = 0;
+		game.addChild(enemy);
+		enemies.push(enemy);
+		var enemyBullet = new EnemyBullet();
+		enemyBullet.x = enemy.x;
+		enemyBullet.y = enemy.y + 50;
+		game.addChild(enemyBullet);
+		enemyBullets.push(enemyBullet);
+	}
 });
\ No newline at end of file