/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.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 = 0.8;
	self.flapStrength = -15;
	self.maxFallSpeed = 12;
	self.flap = function () {
		self.velocity = self.flapStrength;
		LK.getSound('flap').play();
		// Add flap animation
		birdGraphics.rotation = -0.3;
		tween(birdGraphics, {
			rotation: 0.3
		}, {
			duration: 200
		});
	};
	self.update = function () {
		// Apply gravity
		self.velocity += self.gravity;
		// Limit fall speed
		if (self.velocity > self.maxFallSpeed) {
			self.velocity = self.maxFallSpeed;
		}
		// Update position
		self.y += self.velocity;
		// Check ground collision
		if (self.y >= 2732 - 100 - 30) {
			// Ground height minus bird radius
			gameOver = true;
		}
		// Check ceiling collision
		if (self.y <= 30) {
			// Bird radius
			self.y = 30;
			self.velocity = 0;
		}
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	self.speed = -4;
	self.passed = false;
	// Create top pipe
	var topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Create bottom pipe
	var bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.setGap = function (gapY, gapSize) {
		// Position top pipe to cover from top of screen down to gap start
		topPipe.y = 0;
		topPipe.height = gapY - gapSize / 2;
		// Position bottom pipe to cover from gap end to ground level  
		bottomPipe.y = gapY + gapSize / 2;
		bottomPipe.height = 2732 - 100 - (gapY + gapSize / 2); // Screen height minus ground height minus gap end
		// Ensure pipes fully cover their respective areas
		if (topPipe.height < 0) topPipe.height = 0;
		if (bottomPipe.height < 0) bottomPipe.height = 0;
	};
	self.checkCollision = function (bird) {
		var birdBounds = {
			left: bird.x - 30,
			right: bird.x + 30,
			top: bird.y - 22,
			bottom: bird.y + 22
		};
		var pipeBounds = {
			left: self.x - 60,
			right: self.x + 60
		};
		// Check if bird is horizontally aligned with pipe
		if (birdBounds.right > pipeBounds.left && birdBounds.left < pipeBounds.right) {
			// Check collision with top pipe (covers from top to gap start)
			if (birdBounds.top < topPipe.height) {
				return true;
			}
			// Check collision with bottom pipe (covers from gap end to ground)
			if (birdBounds.bottom > bottomPipe.y) {
				return true;
			}
		}
		return false;
	};
	self.update = function () {
		self.x += self.speed;
		// Check if bird passed this pipe
		if (!self.passed && bird.x > self.x + 60) {
			self.passed = true;
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
			LK.getSound('score').play();
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var bird;
var pipes = [];
var ground;
var scoreTxt;
var gameOver = false;
var pipeSpawnTimer = 0;
var pipeSpawnInterval = 270; // Spawn pipe every 4.5 seconds at 60fps
var gapSize = 400;
// Create bird
bird = game.addChild(new Bird());
bird.x = 400;
bird.y = 1366; // Middle of screen
// Create ground
ground = game.attachAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 2732 - 100
});
// Create score display
scoreTxt = new Text2('0', {
	size: 100,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Position score away from top-left menu
scoreTxt.x = 0;
scoreTxt.y = 50;
// Game input handler
game.down = function (x, y, obj) {
	if (!gameOver) {
		bird.flap();
	}
};
// Spawn initial pipes
function spawnPipe() {
	var pipe = new Pipe();
	pipe.x = 2048 + 60; // Start off-screen right
	// Random gap position (avoid too high or too low)
	var gapY = 300 + Math.random() * (2732 - 400 - gapSize);
	pipe.setGap(gapY, gapSize);
	pipes.push(pipe);
	game.addChild(pipe);
}
// Main game update
game.update = function () {
	if (gameOver) {
		LK.showGameOver();
		return;
	}
	// Spawn pipes at intervals
	pipeSpawnTimer++;
	if (pipeSpawnTimer >= pipeSpawnInterval) {
		spawnPipe();
		pipeSpawnTimer = 0;
	}
	// Update pipes and check collisions
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		// Check collision with bird
		if (pipe.checkCollision(bird)) {
			gameOver = true;
			continue;
		}
		// Remove pipes that are off-screen
		if (pipe.x < -120) {
			pipe.destroy();
			pipes.splice(i, 1);
		}
	}
	// Gradually increase difficulty
	if (LK.getScore() > 0 && LK.getScore() % 5 === 0) {
		// Increase pipe speed slightly every 5 points
		var speedIncrease = Math.min(LK.getScore() / 10, 2);
		for (var j = 0; j < pipes.length; j++) {
			pipes[j].speed = -4 - speedIncrease;
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -67,11 +67,14 @@
 	self.setGap = function (gapY, gapSize) {
 		// Position top pipe to cover from top of screen down to gap start
 		topPipe.y = 0;
 		topPipe.height = gapY - gapSize / 2;
-		// Position bottom pipe to cover from gap end to ground level
+		// Position bottom pipe to cover from gap end to ground level  
 		bottomPipe.y = gapY + gapSize / 2;
 		bottomPipe.height = 2732 - 100 - (gapY + gapSize / 2); // Screen height minus ground height minus gap end
+		// Ensure pipes fully cover their respective areas
+		if (topPipe.height < 0) topPipe.height = 0;
+		if (bottomPipe.height < 0) bottomPipe.height = 0;
 	};
 	self.checkCollision = function (bird) {
 		var birdBounds = {
 			left: bird.x - 30,
@@ -124,9 +127,9 @@
 var ground;
 var scoreTxt;
 var gameOver = false;
 var pipeSpawnTimer = 0;
-var pipeSpawnInterval = 180; // Spawn pipe every 3 seconds at 60fps for more spacing
+var pipeSpawnInterval = 270; // Spawn pipe every 4.5 seconds at 60fps
 var gapSize = 400;
 // Create bird
 bird = game.addChild(new Bird());
 bird.x = 400;