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

/**** 
* Classes
****/ 
var Chicken = Container.expand(function () {
	var self = Container.call(this);
	var chickenGraphics = self.attachAsset('chicken', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocity = 0;
	self.gravity = 0.5;
	self.flapPower = -12;
	self.rotation = 0;
	self.flap = function () {
		self.velocity = self.flapPower;
		LK.getSound('flap').play();
		// Animate flap with rotation
		tween(self, {
			rotation: -0.3
		}, {
			duration: 100
		});
		tween(self, {
			rotation: 0
		}, {
			duration: 200
		});
	};
	self.update = function () {
		// Apply gravity
		self.velocity += self.gravity;
		// Move chicken
		self.y += self.velocity;
		// Rotate based on velocity for realistic movement
		if (self.velocity > 0) {
			self.rotation = Math.min(self.velocity * 0.05, 0.5);
		} else {
			self.rotation = Math.max(self.velocity * 0.05, -0.5);
		}
		// Check screen boundaries
		if (self.y < 0 || self.y > 2732) {
			gameOver();
		}
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	self.gapSize = 300;
	self.gapY = 2732 / 2;
	self.speed = -4;
	self.scored = false;
	// Create top obstacle
	self.topObstacle = self.attachAsset('topObstacle', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Create bottom obstacle  
	self.bottomObstacle = self.attachAsset('bottomObstacle', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.setGap = function (gapY, gapSize) {
		self.gapY = gapY;
		self.gapSize = gapSize;
		// Calculate heights to cover full screen areas
		var topHeight = gapY - gapSize / 2;
		var bottomHeight = 2732 - (gapY + gapSize / 2);
		// Resize obstacles to cover full areas
		self.topObstacle.height = topHeight;
		self.bottomObstacle.height = bottomHeight;
		// Position obstacles - top obstacle at top of screen, bottom at gap start
		self.topObstacle.y = 0;
		self.bottomObstacle.y = gapY + gapSize / 2;
	};
	self.update = function () {
		self.x += self.speed;
		// Check if obstacle passed chicken and award score
		if (!self.scored && self.x < chicken.x) {
			self.scored = true;
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
			LK.getSound('score').play();
		}
		// Remove obstacle when off screen
		if (self.x < -100) {
			self.destroy();
			for (var i = obstacles.length - 1; i >= 0; i--) {
				if (obstacles[i] === self) {
					obstacles.splice(i, 1);
					break;
				}
			}
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var chicken;
var obstacles = [];
var gameStarted = false;
var obstacleTimer = 0;
var obstacleSpacing = 180; // Frames between obstacles
// Create score display
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Create chicken
chicken = game.addChild(new Chicken());
chicken.x = 400;
chicken.y = 2732 / 2;
// Create instructions text
var instructionsTxt = new Text2('TAP TO START', {
	size: 60,
	fill: 0xFFFFFF
});
instructionsTxt.anchor.set(0.5, 0.5);
instructionsTxt.x = 2048 / 2;
instructionsTxt.y = 2732 / 2 - 200;
game.addChild(instructionsTxt);
function gameOver() {
	LK.showGameOver();
}
function startGame() {
	if (!gameStarted) {
		gameStarted = true;
		game.removeChild(instructionsTxt);
	}
}
function createObstacle() {
	var obstacle = new Obstacle();
	obstacle.x = 2048 + 60;
	// Random gap position, keeping it reasonable
	var minGapY = 400;
	var maxGapY = 2732 - 400;
	var gapY = minGapY + Math.random() * (maxGapY - minGapY);
	// Gap size gets smaller as score increases
	var baseGapSize = 300;
	var gapSize = Math.max(200, baseGapSize - LK.getScore() * 5);
	obstacle.setGap(gapY, gapSize);
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Input handling
game.down = function (x, y, obj) {
	if (!gameStarted) {
		startGame();
	}
	chicken.flap();
};
// Main game loop
game.update = function () {
	if (!gameStarted) {
		return;
	}
	// Create obstacles
	obstacleTimer++;
	if (obstacleTimer >= obstacleSpacing) {
		createObstacle();
		obstacleTimer = 0;
		// Increase difficulty by reducing spacing
		if (obstacleSpacing > 120) {
			obstacleSpacing = Math.max(120, obstacleSpacing - 1);
		}
	}
	// Check collisions
	for (var i = 0; i < obstacles.length; i++) {
		var obstacle = obstacles[i];
		// Check collision with top obstacle
		if (chicken.intersects(obstacle.topObstacle)) {
			gameOver();
			return;
		}
		// Check collision with bottom obstacle
		if (chicken.intersects(obstacle.bottomObstacle)) {
			gameOver();
			return;
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -67,10 +67,16 @@
 	});
 	self.setGap = function (gapY, gapSize) {
 		self.gapY = gapY;
 		self.gapSize = gapSize;
-		// Position obstacles
-		self.topObstacle.y = gapY - gapSize / 2;
+		// Calculate heights to cover full screen areas
+		var topHeight = gapY - gapSize / 2;
+		var bottomHeight = 2732 - (gapY + gapSize / 2);
+		// Resize obstacles to cover full areas
+		self.topObstacle.height = topHeight;
+		self.bottomObstacle.height = bottomHeight;
+		// Position obstacles - top obstacle at top of screen, bottom at gap start
+		self.topObstacle.y = 0;
 		self.bottomObstacle.y = gapY + gapSize / 2;
 	};
 	self.update = function () {
 		self.x += self.speed;