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

/**** 
* Classes
****/ 
var Obstacle = Container.expand(function (type) {
	var self = Container.call(this);
	var obstacleGraphics;
	self.type = type || 'step';
	self.speed = 0;
	if (self.type === 'step') {
		obstacleGraphics = self.attachAsset('obstacle', {
			anchorX: 0.5,
			anchorY: 1.0
		});
	} else if (self.type === 'barrier') {
		obstacleGraphics = self.attachAsset('barrier', {
			anchorX: 0.5,
			anchorY: 1.0
		});
	} else if (self.type === 'firePit') {
		obstacleGraphics = self.attachAsset('firePit', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (self.type === 'car') {
		obstacleGraphics = self.attachAsset('car', {
			anchorX: 0.5,
			anchorY: 1.0
		});
	}
	self.update = function () {
		self.x -= self.speed;
	};
	self.getCollisionBounds = function () {
		return {
			x: self.x - obstacleGraphics.width / 2,
			y: self.y - obstacleGraphics.height,
			width: obstacleGraphics.width,
			height: obstacleGraphics.height
		};
	};
	self.isLowObstacle = function () {
		return self.type === 'step' || self.type === 'firePit';
	};
	self.isHighObstacle = function () {
		return self.type === 'barrier';
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.isJumping = false;
	self.isDucking = false;
	self.defaultHeight = playerGraphics.height;
	self.defaultY = 0;
	self.jump = function () {
		if (!self.isJumping && !self.isDucking) {
			self.isJumping = true;
			LK.getSound('jump').play();
			// Jump animation
			tween(self, {
				y: self.defaultY - 300
			}, {
				duration: 500,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					// Fall down animation
					tween(self, {
						y: self.defaultY
					}, {
						duration: 500,
						easing: tween.easeIn,
						onFinish: function onFinish() {
							self.isJumping = false;
						}
					});
				}
			});
		}
	};
	self.duck = function () {
		if (!self.isJumping && !self.isDucking) {
			self.isDucking = true;
			playerGraphics.height = self.defaultHeight / 2;
			// Auto stand up after 1 second
			LK.setTimeout(function () {
				if (self.isDucking) {
					playerGraphics.height = self.defaultHeight;
					self.isDucking = false;
				}
			}, 1000);
		}
	};
	self.standUp = function () {
		if (self.isDucking) {
			playerGraphics.height = self.defaultHeight;
			self.isDucking = false;
		}
	};
	self.getCollisionBounds = function () {
		return {
			x: self.x - playerGraphics.width / 2,
			y: self.y - playerGraphics.height,
			width: playerGraphics.width,
			height: playerGraphics.height
		};
	};
	self.update = function () {
		// Move player to the right automatically
	};
	return self;
});
var RoadLine = Container.expand(function () {
	var self = Container.call(this);
	var lineGraphics = self.attachAsset('roadLine', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 0;
	self.update = function () {
		self.x += gameSpeed; // Move player to the right automatically
		self.x -= self.speed;
		// Reset position when off screen
		if (self.x < -lineGraphics.width) {
			self.x = 2048 + lineGraphics.width;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 // Black
});

/**** 
* Game Code
****/ 
// Game variables
var player;
var obstacles = [];
var roadLines = [];
var gameSpeed = 10;
var spawnTimer = 0;
var minSpawnTime = 60;
var maxSpawnTime = 120;
var nextSpawnTime = 100;
var distance = 0;
var isGameOver = false;
var shouldSpawnObstacle = true;
// Create road
var road = game.addChild(LK.getAsset('road', {
	anchorX: 0.5,
	anchorY: 0
}));
road.x = 2048 / 2;
road.y = 2732 - 600;
// Create player
player = game.addChild(new Player());
player.x = 300;
player.y = 2732 - 600;
player.defaultY = player.y;
// Create road lines
for (var i = 0; i < 20; i++) {
	var roadLine = new RoadLine();
	roadLine.x = i * 200;
	roadLine.y = 2732 - 600 + 300;
	roadLine.speed = gameSpeed;
	roadLines.push(roadLine);
	game.addChild(roadLine);
}
// Score display
var scoreTxt = new Text2('0m', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Initialize player input
function handleDown(x, y, obj) {
	// Jump if swiping up or clicking
	if (obj.event && (obj.event.type === 'swipe' && obj.event.direction === 'up' || obj.event.type === 'click')) {
		player.jump();
	} else if (obj.event && obj.event.type === 'swipe' && obj.event.direction === 'down') {
		// Duck if swiping down
		player.duck();
	}
}
function handleUp(x, y, obj) {
	// Stand up when releasing swipe down
	if (player.isDucking) {
		player.standUp();
	}
}
// Set up input handlers
game.down = handleDown;
game.up = handleUp;
// Check collision between player and obstacle
function checkCollision(playerBounds, obstacleBounds) {
	return !(playerBounds.x + playerBounds.width < obstacleBounds.x || playerBounds.x > obstacleBounds.x + obstacleBounds.width || playerBounds.y + playerBounds.height < obstacleBounds.y || playerBounds.y > obstacleBounds.y + obstacleBounds.height);
}
// Spawn a new obstacle
function spawnObstacle() {
	if (!shouldSpawnObstacle) {
		return;
	}
	var types = ['step', 'barrier', 'firePit', 'car'];
	var type = types[Math.floor(Math.random() * types.length)];
	var obstacle = new Obstacle(type);
	obstacle.x = 2048 + 100;
	obstacle.y = 2732 - 600;
	// Adjust Y position based on obstacle type
	if (type === 'firePit') {
		obstacle.y += 50;
	} else if (type === 'car') {
		obstacle.x += Math.random() * 500; // Add some random extra distance for cars
	}
	obstacle.speed = gameSpeed;
	obstacles.push(obstacle);
	game.addChild(obstacle);
	// Set next spawn time
	nextSpawnTime = minSpawnTime + Math.floor(Math.random() * (maxSpawnTime - minSpawnTime));
	spawnTimer = 0;
}
// Handle game over
function gameOver() {
	if (!isGameOver) {
		isGameOver = true;
		shouldSpawnObstacle = false;
		LK.getSound('crash').play();
		// Save high score
		var highScore = storage.highScore || 0;
		if (distance > highScore) {
			storage.highScore = distance;
		}
		// Show game over screen
		LK.effects.flashScreen(0xff0000, 500);
		LK.setTimeout(function () {
			LK.showGameOver();
		}, 1000);
	}
}
// Update function called each frame
game.update = function () {
	if (isGameOver) {
		return;
	}
	// Increase distance score
	distance += 1;
	scoreTxt.setText(Math.floor(distance / 10) + "m");
	// Gradually increase game speed
	if (distance % 500 === 0 && gameSpeed < 25) {
		gameSpeed += 0.5;
		// Update road line speed
		for (var i = 0; i < roadLines.length; i++) {
			roadLines[i].speed = gameSpeed;
		}
		// Update obstacle speed
		for (var j = 0; j < obstacles.length; j++) {
			obstacles[j].speed = gameSpeed;
		}
		// Decrease spawn time as game progresses
		if (minSpawnTime > 30) {
			minSpawnTime -= 2;
		}
		if (maxSpawnTime > 60) {
			maxSpawnTime -= 5;
		}
	}
	// Update road lines
	for (var i = 0; i < roadLines.length; i++) {
		roadLines[i].update();
	}
	// Spawn obstacles
	spawnTimer++;
	if (spawnTimer >= nextSpawnTime) {
		spawnObstacle();
	}
	// Update player position
	player.update();
	// Update and check collisions with obstacles
	for (var j = obstacles.length - 1; j >= 0; j--) {
		var obstacle = obstacles[j];
		obstacle.update();
		// Remove obstacles that are off screen
		if (obstacle.x < -200) {
			obstacle.destroy();
			obstacles.splice(j, 1);
			continue;
		}
		// Check collision
		var playerBounds = player.getCollisionBounds();
		var obstacleBounds = obstacle.getCollisionBounds();
		// Only check collision if:
		// - Player is not jumping AND obstacle is low (step/fire pit)
		// - Player is not ducking AND obstacle is high (barrier)
		var collisionDetected = false;
		if (!player.isJumping && obstacle.isLowObstacle()) {
			collisionDetected = checkCollision(playerBounds, obstacleBounds);
		} else if (!player.isDucking && obstacle.isHighObstacle()) {
			collisionDetected = checkCollision(playerBounds, obstacleBounds);
		} else if (obstacle.type === 'car') {
			// Cars always need to be jumped over
			collisionDetected = checkCollision(playerBounds, obstacleBounds);
		}
		if (collisionDetected) {
			gameOver();
			break;
		}
	}
};
// Start background music
LK.playMusic('bgmusic', {
	fade: {
		start: 0,
		end: 0.5,
		duration: 1000
	}
});

===================================================================
--- original.js
+++ change.js
@@ -114,9 +114,8 @@
 		};
 	};
 	self.update = function () {
 		// Move player to the right automatically
-		self.x += gameSpeed;
 	};
 	return self;
 });
 var RoadLine = Container.expand(function () {