/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1");

/**** 
* Classes
****/ 
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocity = 0;
	self.gravity = 0.3;
	self.flapStrength = -10;
	self.rotation = 0;
	self.dead = false;
	self.flap = function () {
		if (self.dead) {
			return;
		}
		self.velocity = self.flapStrength;
		LK.getSound('flap').play();
		// Rotate bird upward when flapping
		tween(self, {
			rotation: -0.5
		}, {
			duration: 200,
			easing: tween.easeOut
		});
	};
	self.update = function () {
		if (self.dead) {
			return;
		}
		if (gameStarted) {
			self.velocity += self.gravity;
			self.y += self.velocity;
		}
		// Rotate bird downward when falling
		if (self.velocity > 0) {
			var targetRotation = Math.min(Math.PI / 2, self.velocity * 0.05);
			tween(self, {
				rotation: targetRotation
			}, {
				duration: 100,
				easing: tween.linear
			});
		}
	};
	self.die = function () {
		if (self.dead) {
			return;
		}
		self.dead = true;
		LK.getSound('hit').play();
		// Flash red when dying
		LK.effects.flashObject(self, 0xFF0000, 500);
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	var topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1.0,
		flipY: 1 // Flip the top pipe vertically
	});
	var bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0.0
	});
	self.gapSize = 450;
	self.speed = 5;
	self.scored = false;
	self.setGapPosition = function (y) {
		topPipe.y = y - self.gapSize / 2; // Adjust top pipe position
		bottomPipe.y = y + self.gapSize / 2; // Revert bottom pipe position to its original state
	};
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
// Game variables
var bird;
var pipes = [];
var ground;
var gameStarted = false;
var gameSpeed = 5;
var pipeSpawnTimer = 0;
var pipeSpawnInterval = 100;
var score = 0;
var highScore = storage.highScore || 0;
var gameOver = false;
// Initialize GUI elements
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var tapToStartTxt = new Text2('TAP TO START', {
	size: 80,
	fill: 0xFFFFFF
});
tapToStartTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(tapToStartTxt);
var highScoreTxt = new Text2('BEST: 0', {
	size: 60,
	fill: 0xFFFFFF
});
highScoreTxt.anchor.set(0.5, 0);
highScoreTxt.y = 160;
highScoreTxt.setText('BEST: ' + highScore);
LK.gui.top.addChild(highScoreTxt);
// Initialize game objects
function initGame() {
	// Create bird
	bird = new Bird();
	bird.x = 400;
	bird.y = 2732 / 2;
	bird.velocity = 0; // Ensure bird doesn't move before game starts
	game.addChild(bird);
	// Create ground
	ground = LK.getAsset('ground', {
		anchorX: 0,
		anchorY: 0
	});
	ground.y = 2732 - ground.height;
	game.addChild(ground);
	// Move ground to the front
	game.setChildIndex(ground, game.children.length - 1);
	// Reset game state
	pipes = [];
	gameStarted = false;
	gameSpeed = 5;
	pipeSpawnTimer = 0;
	score = 0;
	gameOver = false;
	// Update score display
	scoreTxt.setText('0');
	LK.setScore(0);
	// Show tap to start message
	tapToStartTxt.visible = true;
	// Play background music
	LK.playMusic('bgmusic', {
		fade: {
			start: 0,
			end: 0.4,
			duration: 1000
		}
	});
}
// Create a new pipe
function spawnPipe() {
	var pipe = new Pipe();
	pipe.x = 2048 + pipe.width / 2;
	// Random gap position, but keep within reasonable bounds
	var minGapX = 400;
	var maxGapX = 2048 - 400;
	var gapX = minGapX + Math.random() * (maxGapX - minGapX);
	pipe.setGapPosition(gapX);
	pipe.speed = gameSpeed;
	game.addChild(pipe);
	pipes.push(pipe);
}
// Start the game
function startGame() {
	if (gameStarted || gameOver) {
		return;
	}
	gameStarted = true;
	tapToStartTxt.visible = false;
	bird.flap();
}
// Handle collision detection
function checkCollisions() {
	if (!gameStarted || gameOver) {
		return;
	}
	// Check for ground collision
	if (bird.y + bird.height / 2 > ground.y) {
		gameEnd();
		return;
	}
	// Check for ceiling collision
	if (bird.y - bird.height / 2 < 0) {
		bird.y = bird.height / 2; // Prevent going above the screen
		bird.velocity = 0;
	}
	// Check for pipe collisions
	for (var i = 0; i < pipes.length; i++) {
		var pipe = pipes[i];
		// Get references to the pipe parts
		var topPipe = pipe.children[0];
		var bottomPipe = pipe.children[1];
		// Convert positions to global game coordinates
		var topPipeGlobal = game.toLocal(topPipe.parent.toGlobal(topPipe.position));
		var bottomPipeGlobal = game.toLocal(bottomPipe.parent.toGlobal(bottomPipe.position));
		// Check for collision with top pipe
		if (bird.x + bird.width / 3 > pipe.x - topPipe.width / 2 && bird.x - bird.width / 3 < pipe.x + topPipe.width / 2 && bird.y - bird.height / 3 < topPipeGlobal.y) {
			gameEnd();
			return;
		}
		// Check for collision with bottom pipe
		if (bird.x + bird.width / 3 > pipe.x - bottomPipe.width / 2 && bird.x - bird.width / 3 < pipe.x + bottomPipe.width / 2 && bird.y + bird.height / 3 > bottomPipeGlobal.y) {
			gameEnd();
			return;
		}
		// Check if bird passed pipe (scoring)
		if (!pipe.scored && pipe.x + topPipe.width / 2 < bird.x - bird.width / 2) {
			pipe.scored = true;
			incrementScore();
		}
	}
}
// Increment the score
function incrementScore() {
	score++;
	LK.setScore(score);
	scoreTxt.setText(score.toString());
	// Increase game speed slightly with each point
	if (score % 5 === 0 && gameSpeed < 10) {
		gameSpeed += 0.5;
		// Update speed for existing pipes
		for (var i = 0; i < pipes.length; i++) {
			pipes[i].speed = gameSpeed;
		}
	}
	LK.getSound('point').play();
	// Update high score if needed
	if (score > highScore) {
		highScore = score;
		storage.highScore = highScore;
		highScoreTxt.setText('BEST: ' + highScore);
	}
}
// End the game
function gameEnd() {
	if (gameOver) {
		return;
	}
	gameOver = true;
	bird.die();
	// Flash screen red
	LK.effects.flashScreen(0xFF0000, 500);
	// Show game over after a short delay
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 1000);
}
// Input handlers
game.down = function (x, y, obj) {
	if (!gameStarted) {
		startGame();
	} else if (!gameOver) {
		bird.flap();
	}
};
// Game update function
game.update = function () {
	if (gameStarted && !gameOver) {
		// Spawn pipes
		pipeSpawnTimer++;
		if (pipeSpawnTimer >= pipeSpawnInterval) {
			spawnPipe();
			pipeSpawnTimer = 0;
		}
		// Update pipes
		for (var i = pipes.length - 1; i >= 0; i--) {
			pipes[i].update();
			// Remove pipes that have gone off-screen
			if (pipes[i].x < -pipes[i].width) {
				pipes[i].destroy();
				pipes.splice(i, 1);
			}
		}
		// Check for collisions
		checkCollisions();
	}
};
// Initialize the game
initGame();

===================================================================
--- original.js
+++ change.js
@@ -65,9 +65,10 @@
 var Pipe = Container.expand(function () {
 	var self = Container.call(this);
 	var topPipe = self.attachAsset('pipe', {
 		anchorX: 0.5,
-		anchorY: 1.0
+		anchorY: 1.0,
+		flipY: 1 // Flip the top pipe vertically
 	});
 	var bottomPipe = self.attachAsset('pipe', {
 		anchorX: 0.5,
 		anchorY: 0.0