===================================================================
--- original.js
+++ change.js
@@ -1,55 +1,63 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Define a class for bullets
 var Bullet = Container.expand(function () {
-  var self = Container.call(this);
-  var bulletGraphics = self.attachAsset('bullet', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 10;
-  self.update = function () {
-    self.y -= self.speed;
-  };
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = game.level.bulletSpeed;
+	self.update = function () {
+		self.y -= self.speed;
+	};
 });
 // Define a class for enemies
 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.update = function () {
-    // Update logic for enemy
-  };
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = game.level.enemySpeed;
+	self.update = function () {
+		// Update logic for enemy
+	};
 });
 //<Assets used in the game will automatically appear here>
 // Define a class for the player character
 var Player = Container.expand(function () {
-  var self = Container.call(this);
-  var playerGraphics = self.attachAsset('player', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 5;
-  self.update = function () {
-    // Update logic for player
-  };
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		// Update logic for player
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
+// Define a class for levels
 var game = new LK.Game({
-  backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x000000 //Init game with black background
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
+// Define a class for levels
+var Level = function Level(difficulty) {
+	this.difficulty = difficulty;
+	this.enemySpeed = difficulty === 'hard' ? 5 : difficulty === 'normal' ? 3 : 1;
+	this.bulletSpeed = difficulty === 'hard' ? 10 : difficulty === 'normal' ? 7 : 5;
+};
+game.level = new Level('easy');
 // Initialize player
 var player = game.addChild(new Player());
 player.x = 2048 / 2;
 player.y = 2732 - 150;
@@ -58,72 +66,72 @@
 // Initialize bullets array
 var bullets = [];
 // Function to spawn enemies
 function spawnEnemy() {
-  var enemy = new Enemy();
-  enemy.x = Math.random() * 2048;
-  enemy.y = 0;
-  enemies.push(enemy);
-  game.addChild(enemy);
+	var enemy = new Enemy();
+	enemy.x = Math.random() * 2048;
+	enemy.y = 0;
+	enemies.push(enemy);
+	game.addChild(enemy);
 }
 // Function to handle player movement
 function handlePlayerMovement(x, y, obj) {
-  player.x = x;
-  player.y = y;
+	player.x = x;
+	player.y = y;
 }
 // Function to handle shooting
 function shootBullet() {
-  var bullet = new Bullet();
-  bullet.x = player.x;
-  bullet.y = player.y;
-  bullets.push(bullet);
-  game.addChild(bullet);
+	var bullet = new Bullet();
+	bullet.x = player.x;
+	bullet.y = player.y;
+	bullets.push(bullet);
+	game.addChild(bullet);
 }
 // Set up game event listeners
 game.down = function (x, y, obj) {
-  handlePlayerMovement(x, y, obj);
+	handlePlayerMovement(x, y, obj);
 };
 game.move = function (x, y, obj) {
-  handlePlayerMovement(x, y, obj);
+	handlePlayerMovement(x, y, obj);
 };
 game.up = function (x, y, obj) {
-  // Logic for when touch is released
+	// Logic for when touch is released
 };
 // Game update loop
 game.update = function () {
-  // Update player
-  player.update();
-  // Update enemies
-  for (var i = enemies.length - 1; i >= 0; i--) {
-    enemies[i].update();
-    if (enemies[i].y > 2732) {
-      enemies[i].destroy();
-      enemies.splice(i, 1);
-    }
-  }
-  // Update bullets
-  for (var j = bullets.length - 1; j >= 0; j--) {
-    bullets[j].update();
-    if (bullets[j].y < 0) {
-      bullets[j].destroy();
-      bullets.splice(j, 1);
-    }
-  }
-  // Check for collisions between bullets and enemies
-  for (var k = bullets.length - 1; k >= 0; k--) {
-    for (var l = enemies.length - 1; l >= 0; l--) {
-      if (bullets[k].intersects(enemies[l])) {
-        bullets[k].destroy();
-        enemies[l].destroy();
-        bullets.splice(k, 1);
-        enemies.splice(l, 1);
-        break;
-      }
-    }
-  }
-  // Spawn new enemies periodically
-  if (LK.ticks % 60 === 0) {
-    spawnEnemy();
-  }
+	// Update player
+	player.update();
+	// Update enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		enemies[i].update();
+		if (enemies[i].y > 2732) {
+			enemies[i].destroy();
+			enemies.splice(i, 1);
+		}
+	}
+	// Update bullets
+	for (var j = bullets.length - 1; j >= 0; j--) {
+		bullets[j].update();
+		if (bullets[j].y < 0) {
+			bullets[j].destroy();
+			bullets.splice(j, 1);
+		}
+	}
+	// Check for collisions between bullets and enemies
+	for (var k = bullets.length - 1; k >= 0; k--) {
+		for (var l = enemies.length - 1; l >= 0; l--) {
+			if (bullets[k].intersects(enemies[l])) {
+				bullets[k].destroy();
+				enemies[l].destroy();
+				bullets.splice(k, 1);
+				enemies.splice(l, 1);
+				break;
+			}
+		}
+	}
+	// Spawn new enemies periodically
+	if (LK.ticks % 60 === 0) {
+		spawnEnemy();
+	}
 };
 // Set an interval to shoot bullets
 LK.setInterval(shootBullet, 500);
\ No newline at end of file