===================================================================
--- original.js
+++ change.js
@@ -1,59 +1,154 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Bullet class
 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 = -10;
+	self.update = function () {
+		self.y += self.speed;
+	};
 });
 // 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.update = 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.update = function () {
+		self.y += self.speed;
+	};
 });
 //<Assets used in the game will automatically appear here>
 // Hero class
 var Hero = Container.expand(function () {
-  var self = Container.call(this);
-  var heroGraphics = self.attachAsset('hero', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 5;
-  self.update = function () {
-    // Hero update logic
-  };
-  self.move = function (x, y) {
-    self.x = x;
-    self.y = y;
-  };
+	var self = Container.call(this);
+	var heroGraphics = self.attachAsset('hero', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		// Hero update logic
+	};
+	self.move = function (x, y) {
+		self.x = x;
+		self.y = y;
+	};
 });
+// Main Menu class
+var MainMenu = Container.expand(function () {
+	var self = Container.call(this);
+	// Create menu elements here
+	// For example, we can create a start button
+	var startButton = self.attachAsset('startButton', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	startButton.x = 2048 / 2;
+	startButton.y = 2732 / 2;
+	// Handle start button press
+	startButton.down = function (x, y, obj) {
+		// Start the game
+		self.destroy();
+		startGame();
+	};
+});
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x000000 //Init game with black background
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
+// Initialize main menu
+var mainMenu = game.addChild(new MainMenu());
+// Start game function
+function startGame() {
+	// Initialize variables
+	var hero;
+	var enemies = [];
+	var bullets = [];
+	var score = 0;
+	var scoreTxt;
+	// Initialize hero
+	hero = game.addChild(new Hero());
+	hero.x = 2048 / 2;
+	hero.y = 2732 - 200;
+	// Initialize score text
+	scoreTxt = new Text2('0', {
+		size: 150,
+		fill: "#ffffff"
+	});
+	scoreTxt.anchor.set(0.5, 0);
+	LK.gui.top.addChild(scoreTxt);
+	// Handle game move event
+	game.move = function (x, y, obj) {
+		hero.move(x, y);
+	};
+	// Handle game update event
+	game.update = function () {
+		// Update hero
+		hero.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
+		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);
+					score++;
+					scoreTxt.setText(score);
+					break;
+				}
+			}
+		}
+		// Spawn enemies
+		if (LK.ticks % 60 == 0) {
+			var newEnemy = new Enemy();
+			newEnemy.x = Math.random() * 2048;
+			newEnemy.y = -50;
+			enemies.push(newEnemy);
+			game.addChild(newEnemy);
+		}
+		// Fire bullets
+		if (LK.ticks % 15 == 0) {
+			var newBullet = new Bullet();
+			newBullet.x = hero.x;
+			newBullet.y = hero.y;
+			bullets.push(newBullet);
+			game.addChild(newBullet);
+		}
+	};
+}
 // Initialize variables
 var hero;
 var enemies = [];
 var bullets = [];
@@ -64,64 +159,64 @@
 hero.x = 2048 / 2;
 hero.y = 2732 - 200;
 // Initialize score text
 scoreTxt = new Text2('0', {
-  size: 150,
-  fill: "#ffffff"
+	size: 150,
+	fill: "#ffffff"
 });
 scoreTxt.anchor.set(0.5, 0);
 LK.gui.top.addChild(scoreTxt);
 // Handle game move event
 game.move = function (x, y, obj) {
-  hero.move(x, y);
+	hero.move(x, y);
 };
 // Handle game update event
 game.update = function () {
-  // Update hero
-  hero.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
-  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);
-        score++;
-        scoreTxt.setText(score);
-        break;
-      }
-    }
-  }
-  // Spawn enemies
-  if (LK.ticks % 60 == 0) {
-    var newEnemy = new Enemy();
-    newEnemy.x = Math.random() * 2048;
-    newEnemy.y = -50;
-    enemies.push(newEnemy);
-    game.addChild(newEnemy);
-  }
-  // Fire bullets
-  if (LK.ticks % 15 == 0) {
-    var newBullet = new Bullet();
-    newBullet.x = hero.x;
-    newBullet.y = hero.y;
-    bullets.push(newBullet);
-    game.addChild(newBullet);
-  }
+	// Update hero
+	hero.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
+	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);
+				score++;
+				scoreTxt.setText(score);
+				break;
+			}
+		}
+	}
+	// Spawn enemies
+	if (LK.ticks % 60 == 0) {
+		var newEnemy = new Enemy();
+		newEnemy.x = Math.random() * 2048;
+		newEnemy.y = -50;
+		enemies.push(newEnemy);
+		game.addChild(newEnemy);
+	}
+	// Fire bullets
+	if (LK.ticks % 15 == 0) {
+		var newBullet = new Bullet();
+		newBullet.x = hero.x;
+		newBullet.y = hero.y;
+		bullets.push(newBullet);
+		game.addChild(newBullet);
+	}
 };
\ No newline at end of file