/**** 
* Classes
****/
var FlightBuff = Container.expand(function () {
	var self = Container.call(this);
	self.applyTo = function (bird) {
		bird.gravity = 0;
		bird.velocityY = 0;
		bird.isFlying = true;
		var buffIndicator = new BuffIndicator('flight');
		buffIndicator.x = bird.x;
		buffIndicator.y = bird.y - bird.height;
		game.addChild(buffIndicator);
		var moveHandler = function moveHandler(obj) {
			var pos = obj.event.getLocalPosition(game);
			bird.y = pos.y;
		};
		game.on('move', moveHandler);
		LK.setTimeout(function () {
			bird.gravity = 0.6;
			bird.isFlying = false;
			game.off('move', moveHandler);
			buffIndicator.destroy();
		}, 5000);
	};
});
var BuffIndicator = Container.expand(function (buffType) {
	var self = Container.call(this);
	var indicatorGraphics;
	switch (buffType) {
		case 'invincibility':
			indicatorGraphics = self.attachAsset('star', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			break;
		case 'multiplier':
			indicatorGraphics = self.attachAsset('diamond', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			break;
		case 'flight':
			indicatorGraphics = self.attachAsset('wings', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			break;
	}
	self.alpha = 0.5; // Make the indicator semi-transparent
	self.lifetime = 5000; // The duration for which the indicator is displayed
	self.update = function () {
		self.lifetime -= LK.tickDuration;
		if (self.lifetime <= 0) {
			self.destroy();
		}
	};
});
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 = 0.6;
	self.invincible = false;
	self.scoreMultiplier = 1;
	self.flapPower = -15;
	self.isFlying = false;
	self.flap = function () {
		self.velocityY = self.flapPower;
		self.tweenUp = true;
		self.tweenUpTime = 0;
	};
	self.updatePhysics = function () {
		if (self.tweenUp) {
			self.tweenUpTime += 1;
			if (self.tweenUpTime > 10) {
				self.tweenUp = false;
				self.tweenUpTime = 0;
			}
		} else {
			self.velocityY += self.gravity;
		}
		self.y += self.velocityY;
		// Update bird's rotation based on velocity
		self.rotation = Math.max(Math.min(self.velocityY * 0.02, Math.PI / 2), -Math.PI / 2);
		// Lock the bird's horizontal position to the center of the screen
		self.x = game.width / 2;
		// Keep the bird within the game boundaries and check for ground collision
		if (self.y > game.height - ground.height) {
			self.y = game.height - ground.height;
			// Create particle effect for collision with ground
			LK.effects.flashObject(self, 0xff0000, 700);
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		} else if (self.y < 0) {
			self.y = 0;
		}
	};
});
var MovingObstacle = Container.expand(function () {
	var self = Container.call(this);
	var topPipe = self.attachAsset('largePipe', {
		anchorX: 0.5,
		anchorY: 1,
		flipY: 1 // Flip the top pipe vertically
	});
	var bottomPipe = self.attachAsset('largePipe', {
		anchorX: 0.5,
		anchorY: 0
	});
	var gapSize = 300;
	self.verticalSpeed = 2;
	self.direction = 1;
	self.setGap = function (gapY) {
		topPipe.y = gapY - gapSize / 2 - topPipe.height;
		bottomPipe.y = gapY + gapSize / 2;
	};
	self.move = function () {
		self.x -= 4; // Move left
		if (self.y <= 0 || self.y >= game.height - bottomPipe.height - gapSize) {
			self.direction *= -1; // Change direction when hitting bounds
		}
		self.y += self.verticalSpeed * self.direction; // Move vertically
	};
	self.resetPosition = function (newX, newY) {
		self.x = newX;
		self.y = newY;
	};
	self.getTopPipe = function () {
		return topPipe;
	};
	self.getBottomPipe = function () {
		return bottomPipe;
	};
});
var Button = Container.expand(function (label, callback) {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('ground', {
		width: 100,
		height: 50,
		color: 0x0000ff,
		shape: 'box'
	});
	var buttonText = new Text2(label, {
		size: 50,
		fill: '#ffffff'
	});
	buttonText.anchor.set(0.5, 0.5);
	buttonText.x = buttonGraphics.width / 2;
	buttonText.y = buttonGraphics.height / 2;
	self.addChild(buttonText);
	self.interactive = true;
	self.buttonMode = true;
	self.on('down', function (obj) {
		callback();
	});
});
var PowerUp = Container.expand(function (type) {
	var self = Container.call(this);
	var powerUpGraphics;
	switch (type) {
		case 'invincibility':
			powerUpGraphics = self.attachAsset('star', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.effect = function (bird) {
				bird.invincible = true;
				LK.setTimeout(function () {
					bird.invincible = false;
				}, 5000);
			};
			break;
		case 'multiplier':
			powerUpGraphics = self.attachAsset('diamond', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.effect = function (bird) {
				bird.scoreMultiplier = 2;
				LK.setTimeout(function () {
					bird.scoreMultiplier = 1;
				}, 5000);
			};
			break;
		case 'flight':
			powerUpGraphics = self.attachAsset('wings', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.effect = function (bird) {
				var flightBuff = new FlightBuff();
				game.addChild(flightBuff);
				flightBuff.applyTo(bird);
			};
			break;
	}
	self.move = function () {
		self.x -= 4;
	};
	self.collect = function (bird) {
		self.effect(bird);
		// Create a visual indicator for the active power-up
		var buffIndicator = new BuffIndicator(type);
		buffIndicator.x = bird.x;
		buffIndicator.y = bird.y - bird.height;
		game.addChild(buffIndicator);
		// Add text to the bird that describes the function of the power-up it collected
		var powerUpText = new Text2(type.toUpperCase(), {
			size: 50,
			fill: '#ffffff'
		});
		powerUpText.anchor.set(0.5, 0);
		powerUpText.x = bird.x;
		powerUpText.y = bird.y - bird.height - 50;
		game.addChild(powerUpText);
		LK.setTimeout(function () {
			powerUpText.destroy();
		}, 5000);
		self.destroy();
	};
});

/**** 
* Initialize Game
****/
var game = new LK.Game({
	backgroundColor: 0x87CEEB // Init game with sky blue background
});

/**** 
* Game Code
****/
// Initialize ground asset
var ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0.0,
	// Left anchor x-coordinate
	anchorY: 1.0,
	// Bottom anchor y-coordinate
	x: 0,
	// Position x-coordinate
	y: game.height // Position y-coordinate
}));
function startGame() {
	var powerUps = [];
	// Clear the main menu
	if (mainMenu) {
		mainMenu.destroy();
		mainMenu = null;
	}
	// Create and initialize the bird
	var bird = game.addChild(new Bird());
	bird.x = game.width / 2;
	bird.y = game.height / 2;
	var obstacles = [];
	// Add touch event to make the bird flap and jump only if it's not flying
	game.on('down', function (obj) {
		// Ensure bird is defined and accessible
		if (bird && !bird.isFlying) {
			bird.flap();
		}
		// Update bird's position immediately after flapping
		bird.updatePhysics();
	});
	// Set up the game tick event for the level
	var pipeCreationInterval = 1500; // Time in milliseconds between pipe creation
	var lastPipeCreationTime = Date.now();
	LK.on('tick', function () {
		// Update bird physics
		bird.updatePhysics();
		// Move obstacles and create new ones at intervals
		if (obstacles) {
			for (var i = obstacles.length - 1; i >= 0; i--) {
				obstacles[i].move();
				// Remove off-screen obstacles
				if (obstacles[i].x < -obstacles[i].width) {
					obstacles[i].destroy();
					obstacles.splice(i, 1);
				}
			}
			// Check if it's time to create a new pipe
			if (Date.now() - lastPipeCreationTime > pipeCreationInterval) {
				var obstacle = game.addChild(new MovingObstacle());
				obstacle.setGap(Math.random() * (game.height - 200) + 100);
				obstacle.x = game.width;
				obstacles.push(obstacle);
				lastPipeCreationTime = Date.now();
			}
		}
		// Generate power-ups at intervals
		if (LK.ticks % 600 == 0) {
			var powerUpType = ['invincibility', 'multiplier', 'flight'][Math.floor(Math.random() * 3)];
			var powerUp = new PowerUp(powerUpType);
			powerUp.x = game.width;
			powerUp.y = Math.random() * (game.height - 200) + 100;
			powerUp.alpha = 0; // Start fully transparent
			LK.effects.fadeIn(powerUp, 500); // Fade in over 500ms
			game.addChild(powerUp);
			powerUps.push(powerUp);
		}
		// Move power-ups and check for collection
		for (var p = powerUps.length - 1; p >= 0; p--) {
			powerUps[p].move();
			if (bird.intersects(powerUps[p])) {
				powerUps[p].collect(bird);
				powerUps.splice(p, 1);
			} else if (powerUps[p].x < -powerUps[p].width) {
				powerUps[p].destroy();
				powerUps.splice(p, 1);
			}
		}
		// Check for collision between the bird and the pipes and increment score
		var passedPipe = false;
		for (var i = obstacles.length - 1; i >= 0; i--) {
			var obstacle = obstacles[i];
			var topPipe = obstacle.getTopPipe();
			var bottomPipe = obstacle.getBottomPipe();
			if (bird.invincible) {
				if (bird.intersects(topPipe) || bird.intersects(bottomPipe)) {
					obstacles[i].destroy();
					obstacles.splice(i, 1);
					LK.effects.flashObject(topPipe, 0xffff00, 300);
					LK.effects.flashObject(bottomPipe, 0xffff00, 300);
				}
			} else if (bird.intersects(topPipe) || bird.intersects(bottomPipe)) {
				LK.effects.flashObject(bird, 0xff0000, 700);
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				break;
			} else if (bird.x > topPipe.x + topPipe.width && !obstacle.passed) {
				obstacle.passed = true;
				passedPipe = true;
			}
		}
		if (passedPipe) {
			LK.setScore(LK.getScore() + 1 * bird.scoreMultiplier);
			scoreTxt.setText(LK.getScore());
			// Create particle effect for scoring
			LK.effects.flashObject(bird, 0xffff00, 500);
		}
	});
}
var mainMenu = null;
var powerUps = [];
var bird = null;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff",
	anchorX: 0.5,
	anchorY: 0
});
LK.gui.top.addChild(scoreTxt);
startGame();

===================================================================
--- original.js
+++ change.js
@@ -48,28 +48,10 @@
 			break;
 	}
 	self.alpha = 0.5; // Make the indicator semi-transparent
 	self.lifetime = 5000; // The duration for which the indicator is displayed
-	// Initialize the pulsating effect
-	self.pulsateDirection = 1;
-	self.pulsateSpeed = 0.005;
-	// Create a countdown timer text for the buff indicator
-	self.countdownText = new Text2(Math.floor(self.lifetime / 1000).toString(), {
-		size: 50,
-		fill: '#ffffff'
-	});
-	self.countdownText.anchor.set(0.5, 0);
-	self.countdownText.y = -self.height / 2 - 20;
-	self.addChild(self.countdownText);
 	self.update = function () {
 		self.lifetime -= LK.tickDuration;
-		// Update the pulsating effect
-		self.alpha += self.pulsateDirection * self.pulsateSpeed;
-		if (self.alpha <= 0.5 || self.alpha >= 1) {
-			self.pulsateDirection *= -1;
-		}
-		// Update the countdown timer text
-		self.countdownText.setText(Math.max(Math.floor(self.lifetime / 1000), 0).toString());
 		if (self.lifetime <= 0) {
 			self.destroy();
 		}
 	};
@@ -313,8 +295,10 @@
 			var powerUpType = ['invincibility', 'multiplier', 'flight'][Math.floor(Math.random() * 3)];
 			var powerUp = new PowerUp(powerUpType);
 			powerUp.x = game.width;
 			powerUp.y = Math.random() * (game.height - 200) + 100;
+			powerUp.alpha = 0; // Start fully transparent
+			LK.effects.fadeIn(powerUp, 500); // Fade in over 500ms
 			game.addChild(powerUp);
 			powerUps.push(powerUp);
 		}
 		// Move power-ups and check for collection