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

/**** 
* Classes
****/ 
var Bike = Container.expand(function () {
	var self = Container.call(this);
	var bikeBody = self.attachAsset('bike', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var frontWheel = self.attachAsset('wheel', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 25,
		y: 15
	});
	var backWheel = self.attachAsset('wheel', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -25,
		y: 15
	});
	self.velocityY = 0;
	self.gravity = 0.8;
	self.jumpPower = -18;
	self.isGrounded = false;
	self.groundY = 0;
	self.jump = function () {
		if (self.isGrounded) {
			self.velocityY = self.jumpPower;
			self.isGrounded = false;
			LK.getSound('jump').play();
		}
	};
	self.update = function () {
		// Apply gravity
		self.velocityY += self.gravity;
		self.y += self.velocityY;
		// Ground collision
		if (self.y >= self.groundY) {
			self.y = self.groundY;
			self.velocityY = 0;
			self.isGrounded = true;
		}
		// Animate wheels
		frontWheel.rotation += 0.3;
		backWheel.rotation += 0.3;
		// Bike tilt based on velocity
		bikeBody.rotation = self.velocityY * 0.02;
	};
	return self;
});
var GroundSegment = Container.expand(function () {
	var self = Container.call(this);
	var groundGraphics = self.attachAsset('ground', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = -12;
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});
var Ramp = Container.expand(function () {
	var self = Container.call(this);
	var rampGraphics = self.attachAsset('ramp', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = -12;
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var bike;
var obstacles = [];
var ramps = [];
var groundSegments = [];
var gameSpeed = 12;
var distanceScore = 0;
var isGameRunning = true;
var groundLevel = 2400;
var lastObstacleSpawn = 0;
var spawnDistance = 300;
// Create score display
var scoreTxt = new Text2('Distance: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Create bike
bike = game.addChild(new Bike());
bike.x = 400;
bike.y = groundLevel;
bike.groundY = groundLevel;
// Initialize ground segments
function createGroundSegments() {
	for (var i = 0; i < 15; i++) {
		var segment = new GroundSegment();
		segment.x = i * 200;
		segment.y = groundLevel + 40;
		groundSegments.push(segment);
		game.addChild(segment);
	}
}
createGroundSegments();
// Spawn obstacle
function spawnObstacle() {
	var obstacle = new Obstacle();
	obstacle.x = 2200;
	obstacle.y = groundLevel;
	obstacle.speed = -gameSpeed;
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Spawn ramp
function spawnRamp() {
	var ramp = new Ramp();
	ramp.x = 2200;
	ramp.y = groundLevel;
	ramp.speed = -gameSpeed;
	ramps.push(ramp);
	game.addChild(ramp);
}
// Game input
game.down = function (x, y, obj) {
	if (isGameRunning) {
		bike.jump();
	}
};
// Main game loop
game.update = function () {
	if (!isGameRunning) return;
	// Update distance score
	distanceScore += 1;
	LK.setScore(Math.floor(distanceScore / 10));
	scoreTxt.setText('Distance: ' + Math.floor(distanceScore / 10));
	// Increase game speed gradually
	if (LK.ticks % 300 === 0) {
		gameSpeed += 0.8;
	}
	// Update ground segments
	for (var i = groundSegments.length - 1; i >= 0; i--) {
		var segment = groundSegments[i];
		segment.speed = -gameSpeed;
		if (segment.x < -200) {
			segment.x = (groundSegments.length - 1) * 200;
		}
	}
	// Spawn obstacles and ramps
	if (distanceScore - lastObstacleSpawn > spawnDistance) {
		if (Math.random() < 0.7) {
			spawnObstacle();
		} else {
			spawnRamp();
		}
		lastObstacleSpawn = distanceScore;
		spawnDistance = 200 + Math.random() * 200;
	}
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		obstacle.speed = -gameSpeed;
		// Remove off-screen obstacles
		if (obstacle.x < -100) {
			obstacle.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision detection
		if (bike.intersects(obstacle)) {
			// Game over
			isGameRunning = false;
			LK.getSound('crash').play();
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
	}
	// Update ramps
	for (var i = ramps.length - 1; i >= 0; i--) {
		var ramp = ramps[i];
		ramp.speed = -gameSpeed;
		// Remove off-screen ramps
		if (ramp.x < -100) {
			ramp.destroy();
			ramps.splice(i, 1);
			continue;
		}
		// Ramp boost effect
		if (bike.intersects(ramp) && bike.isGrounded) {
			bike.velocityY = bike.jumpPower * 1.2;
			bike.isGrounded = false;
		}
	}
	// Check if bike fell off the track
	if (bike.y > groundLevel + 200) {
		isGameRunning = false;
		LK.getSound('crash').play();
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -59,9 +59,9 @@
 	var groundGraphics = self.attachAsset('ground', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.speed = -8;
+	self.speed = -12;
 	self.update = function () {
 		self.x += self.speed;
 	};
 	return self;
@@ -71,9 +71,9 @@
 	var obstacleGraphics = self.attachAsset('obstacle', {
 		anchorX: 0.5,
 		anchorY: 1
 	});
-	self.speed = -8;
+	self.speed = -12;
 	self.update = function () {
 		self.x += self.speed;
 	};
 	return self;
@@ -83,9 +83,9 @@
 	var rampGraphics = self.attachAsset('ramp', {
 		anchorX: 0.5,
 		anchorY: 1
 	});
-	self.speed = -8;
+	self.speed = -12;
 	self.update = function () {
 		self.x += self.speed;
 	};
 	return self;
@@ -104,9 +104,9 @@
 var bike;
 var obstacles = [];
 var ramps = [];
 var groundSegments = [];
-var gameSpeed = 8;
+var gameSpeed = 12;
 var distanceScore = 0;
 var isGameRunning = true;
 var groundLevel = 2400;
 var lastObstacleSpawn = 0;
@@ -166,9 +166,9 @@
 	LK.setScore(Math.floor(distanceScore / 10));
 	scoreTxt.setText('Distance: ' + Math.floor(distanceScore / 10));
 	// Increase game speed gradually
 	if (LK.ticks % 300 === 0) {
-		gameSpeed += 0.5;
+		gameSpeed += 0.8;
 	}
 	// Update ground segments
 	for (var i = groundSegments.length - 1; i >= 0; i--) {
 		var segment = groundSegments[i];