/**** 
* Classes
****/ 
var Bird = Container.expand(function () {
	var self = Container.call(this);
	// Create bird graphics
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Physics properties
	self.velocity = 0;
	self.gravity = 0.8;
	self.flapPower = -12;
	self.maxVelocity = 15;
	// Tracking properties
	self.lastY = 0;
	self.update = function () {
		// Store last position
		self.lastY = self.y;
		// Apply gravity
		self.velocity += self.gravity;
		// Limit velocity
		if (self.velocity > self.maxVelocity) {
			self.velocity = self.maxVelocity;
		}
		// Update position
		self.y += self.velocity;
		// Rotate bird based on velocity
		birdGraphics.rotation = Math.min(Math.max(self.velocity * 0.05, -0.5), 1.2);
	};
	self.flap = function () {
		self.velocity = self.flapPower;
		LK.getSound('flap').play();
	};
	return self;
});
var Ground = Container.expand(function () {
	var self = Container.call(this);
	// Create ground graphics
	var groundGraphics = self.attachAsset('ground', {
		anchorX: 0,
		anchorY: 0
	});
	// Movement properties
	self.speed = -4;
	self.update = function () {
		// Move ground left
		self.x += self.speed;
		// Reset position when off screen for infinite scrolling
		if (self.x <= -2048) {
			self.x = 2048;
		}
	};
	return self;
});
// Game variables
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	// Create top and bottom pipe parts
	var topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1
	});
	var bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0
	});
	// Movement properties
	self.speed = -4;
	self.gapSize = 300;
	self.passed = false;
	// Tracking properties
	self.lastX = 0;
	self.setGapPosition = function (centerY) {
		// Position top pipe (anchor at bottom, so y is bottom edge)
		topPipe.y = centerY - self.gapSize / 2;
		// Position bottom pipe (anchor at top, so y is top edge)  
		bottomPipe.y = centerY + self.gapSize / 2;
	};
	self.update = function () {
		// Store last position
		self.lastX = self.x;
		// Move pipe left
		self.x += self.speed;
	};
	self.getTopBounds = function () {
		return {
			x: self.x - 60,
			y: 0,
			width: 120,
			height: topPipe.y
		};
	};
	self.getBottomBounds = function () {
		return {
			x: self.x - 60,
			y: bottomPipe.y,
			width: 120,
			height: 2732 - bottomPipe.y
		};
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Initialize sound for flap
// Initialize ground asset - brown rectangle for the ground
// Initialize pipe assets - green rectangles for obstacles
// Initialize bird asset - yellow circle for the flappy bird
// Game variables
var bird;
var pipes = [];
var ground1, ground2;
var gameStarted = false;
var pipeTimer = 0;
var pipeSpacing = 400;
// Score display
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Initialize bird
bird = game.addChild(new Bird());
bird.x = 400;
bird.y = 1366; // Center of screen vertically
bird.lastY = bird.y; // Initialize tracking property
// Initialize ground
ground1 = game.addChild(new Ground());
ground1.x = 0;
ground1.y = 1524; // Position ground so it's visible (2732 - 1208 = 1524)
ground2 = game.addChild(new Ground());
ground2.x = 2048;
ground2.y = 1524; // Position ground so it's visible
// Tap to flap
game.down = function (x, y, obj) {
	if (!gameStarted) {
		gameStarted = true;
	}
	bird.flap();
};
// Collision detection helper function
function checkCollision(birdBounds, pipeBounds) {
	return birdBounds.x < pipeBounds.x + pipeBounds.width && birdBounds.x + birdBounds.width > pipeBounds.x && birdBounds.y < pipeBounds.y + pipeBounds.height && birdBounds.y + birdBounds.height > pipeBounds.y;
}
// Main game update
game.update = function () {
	if (!gameStarted) return;
	// Store bird's last Y position
	if (bird.lastY === undefined) bird.lastY = bird.y;
	// Spawn pipes
	pipeTimer++;
	if (pipeTimer >= pipeSpacing / 4) {
		// Adjust timing based on speed
		var newPipe = new Pipe();
		newPipe.x = 2200; // Start off-screen right
		newPipe.lastX = newPipe.x; // Initialize tracking property
		// Random gap position (avoid top and bottom areas)
		var gapCenter = 500 + Math.random() * 1200; // Between 500 and 1700 for better gameplay
		newPipe.setGapPosition(gapCenter);
		pipes.push(newPipe);
		game.addChild(newPipe);
		pipeTimer = 0;
	}
	// Update pipes and check collisions/scoring
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		// Initialize tracking properties
		if (pipe.lastX === undefined) pipe.lastX = pipe.x;
		// Check if pipe passed bird for scoring
		if (!pipe.passed && pipe.lastX > bird.x && pipe.x <= bird.x) {
			pipe.passed = true;
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
		}
		// Remove pipes that are off screen
		if (pipe.x < -200) {
			pipe.destroy();
			pipes.splice(i, 1);
			continue;
		}
		// Check collision with pipes
		var birdBounds = {
			x: bird.x - 25,
			y: bird.y - 25,
			width: 50,
			height: 50
		};
		var topBounds = pipe.getTopBounds();
		var bottomBounds = pipe.getBottomBounds();
		if (checkCollision(birdBounds, topBounds) || checkCollision(birdBounds, bottomBounds)) {
			LK.effects.flashScreen(0xff0000, 500);
			LK.showGameOver();
			return;
		}
		// Update last position
		pipe.lastX = pipe.x;
	}
	// Check collision with ground
	if (bird.y >= 1494) {
		// Ground collision (ground at 1524, bird radius 30)
		LK.effects.flashScreen(0xff0000, 500);
		LK.showGameOver();
		return;
	}
	// Check collision with ceiling
	if (bird.y <= 30) {
		LK.effects.flashScreen(0xff0000, 500);
		LK.showGameOver();
		return;
	}
	// Update last position
	bird.lastY = bird.y;
};

===================================================================
--- original.js
+++ change.js
@@ -88,17 +88,17 @@
 		return {
 			x: self.x - 60,
 			y: 0,
 			width: 120,
-			height: topPipe.y + topPipe.height
+			height: topPipe.y
 		};
 	};
 	self.getBottomBounds = function () {
 		return {
 			x: self.x - 60,
 			y: bottomPipe.y,
 			width: 120,
-			height: 1524 - bottomPipe.y
+			height: 2732 - bottomPipe.y
 		};
 	};
 	return self;
 });