===================================================================
--- original.js
+++ change.js
@@ -1,100 +1,101 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 //<Write imports for supported plugins here>
 // Bird class representing the player-controlled bird
 var Bird = Container.expand(function () {
-  var self = Container.call(this);
-  var birdGraphics = self.attachAsset('bird', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.velocityY = 0;
-  self.gravity = 0.5;
-  self.lift = -10;
-  self.update = function () {
-    self.velocityY += self.gravity;
-    self.y += self.velocityY;
-    // Prevent bird from going off-screen
-    if (self.y < 0) {
-      self.y = 0;
-      self.velocityY = 0;
-    } else if (self.y > 2732) {
-      self.y = 2732;
-      self.velocityY = 0;
-    }
-  };
-  self.flap = function () {
-    self.velocityY = self.lift;
-  };
+	var self = Container.call(this);
+	var birdGraphics = self.attachAsset('bird', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.velocityY = 0;
+	self.gravity = 0.5;
+	self.lift = -10;
+	self.update = function () {
+		self.velocityY += self.gravity;
+		self.y += self.velocityY;
+		// Prevent bird from going off-screen
+		if (self.y < 0) {
+			self.y = 0;
+			self.velocityY = 0;
+		} else if (self.y > 2732) {
+			self.y = 2732;
+			self.velocityY = 0;
+		}
+	};
+	self.flap = function () {
+		self.velocityY = self.lift;
+	};
 });
 // Obstacle class representing the obstacles
 var Obstacle = Container.expand(function () {
-  var self = Container.call(this);
-  var obstacleGraphics = self.attachAsset('obstacle', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = -5;
-  self.update = function () {
-    self.x += self.speed;
-    // Remove obstacle if it goes off-screen
-    if (self.x < -100) {
-      self.destroy();
-    }
-  };
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -5;
+	self.update = function () {
+		self.x += self.speed;
+		// Remove obstacle if it goes off-screen
+		if (self.x < -100) {
+			self.destroy();
+		}
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x87ceeb // Sky blue background
+	backgroundColor: 0x87ceeb // Sky blue background
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 //<Assets used in the game will automatically appear here>
 var bird = game.addChild(new Bird());
 bird.x = 2048 / 2;
 bird.y = 2732 / 2;
 var obstacles = [];
 var obstacleInterval = 100; // Interval for obstacle generation
 var ticks = 0;
 game.down = function (x, y, obj) {
-  bird.flap();
+	bird.flap();
+	LK.getSound('Tik').play();
 };
 game.update = function () {
-  bird.update();
-  // Generate obstacles at intervals
-  if (ticks % obstacleInterval === 0) {
-    var gap = 300; // Gap between top and bottom obstacles
-    var topObstacleHeight = Math.random() * (2732 - gap);
-    var bottomObstacleHeight = 2732 - topObstacleHeight - gap;
-    var topObstacle = new Obstacle();
-    topObstacle.x = 2048;
-    topObstacle.y = topObstacleHeight / 2;
-    obstacles.push(topObstacle);
-    game.addChild(topObstacle);
-    var bottomObstacle = new Obstacle();
-    bottomObstacle.x = 2048;
-    bottomObstacle.y = 2732 - bottomObstacleHeight / 2;
-    obstacles.push(bottomObstacle);
-    game.addChild(bottomObstacle);
-  }
-  // Update obstacles and check for collisions
-  for (var i = obstacles.length - 1; i >= 0; i--) {
-    var obstacle = obstacles[i];
-    obstacle.update();
-    if (bird.intersects(obstacle)) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-      return;
-    }
-    if (obstacle.x < -100) {
-      obstacles.splice(i, 1);
-    }
-  }
-  ticks++;
+	bird.update();
+	// Generate obstacles at intervals
+	if (ticks % obstacleInterval === 0) {
+		var gap = 300; // Gap between top and bottom obstacles
+		var topObstacleHeight = Math.random() * (2732 - gap);
+		var bottomObstacleHeight = 2732 - topObstacleHeight - gap;
+		var topObstacle = new Obstacle();
+		topObstacle.x = 2048;
+		topObstacle.y = topObstacleHeight / 2;
+		obstacles.push(topObstacle);
+		game.addChild(topObstacle);
+		var bottomObstacle = new Obstacle();
+		bottomObstacle.x = 2048;
+		bottomObstacle.y = 2732 - bottomObstacleHeight / 2;
+		obstacles.push(bottomObstacle);
+		game.addChild(bottomObstacle);
+	}
+	// Update obstacles and check for collisions
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		obstacle.update();
+		if (bird.intersects(obstacle)) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+		if (obstacle.x < -100) {
+			obstacles.splice(i, 1);
+		}
+	}
+	ticks++;
 };
\ No newline at end of file