/**** 
* 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 (chargeMultiplier) {
		if (self.isGrounded) {
			var jumpStrength = self.jumpPower * (1 + chargeMultiplier);
			self.velocityY = jumpStrength;
			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 = -18;
	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 = -18;
	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 = -18;
	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 = 18;
var distanceScore = 0;
var isGameRunning = true;
var groundLevel = 2400;
var lastObstacleSpawn = 0;
var spawnDistance = 300;
var isCharging = false;
var chargeStartTime = 0;
var currentCharge = 0;
var maxCharge = 100;
var chargeRate = 2;
// 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 jump meter background
var meterBg = LK.getAsset('obstacle', {
	anchorX: 0,
	anchorY: 0,
	scaleX: 4,
	scaleY: 0.5,
	tint: 0x333333
});
meterBg.x = 100;
meterBg.y = 150;
LK.gui.topLeft.addChild(meterBg);
// Create jump meter fill
var meterFill = LK.getAsset('obstacle', {
	anchorX: 0,
	anchorY: 0,
	scaleX: 0,
	scaleY: 0.5,
	tint: 0x00ff00
});
meterFill.x = 100;
meterFill.y = 150;
LK.gui.topLeft.addChild(meterFill);
// Create jump meter label
var meterLabel = new Text2('JUMP POWER', {
	size: 40,
	fill: 0xFFFFFF
});
meterLabel.anchor.set(0, 0);
meterLabel.x = 100;
meterLabel.y = 100;
LK.gui.topLeft.addChild(meterLabel);
// 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 - start charging
game.down = function (x, y, obj) {
	if (isGameRunning && bike.isGrounded) {
		isCharging = true;
		chargeStartTime = LK.ticks;
		currentCharge = 0;
	}
};
// Game input - release jump
game.up = function (x, y, obj) {
	if (isGameRunning && isCharging) {
		var chargeMultiplier = currentCharge / maxCharge;
		bike.jump(chargeMultiplier);
		isCharging = false;
		currentCharge = 0;
	}
};
// Main game loop
game.update = function () {
	if (!isGameRunning) return;
	// Update jump charge system
	if (isCharging && bike.isGrounded) {
		currentCharge += chargeRate;
		if (currentCharge > maxCharge) {
			currentCharge = maxCharge;
		}
	} else if (!bike.isGrounded) {
		isCharging = false;
		currentCharge = 0;
	}
	// Update jump meter UI
	var fillPercent = currentCharge / maxCharge;
	meterFill.scaleX = 4 * fillPercent;
	// Change color based on charge level
	if (fillPercent < 0.3) {
		meterFill.tint = 0xff0000; // Red
	} else if (fillPercent < 0.7) {
		meterFill.tint = 0xffff00; // Yellow
	} else {
		meterFill.tint = 0x00ff00; // Green
	}
	// 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 += 1.2;
	}
	// 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
@@ -28,11 +28,12 @@
 	self.gravity = 0.8;
 	self.jumpPower = -18;
 	self.isGrounded = false;
 	self.groundY = 0;
-	self.jump = function () {
+	self.jump = function (chargeMultiplier) {
 		if (self.isGrounded) {
-			self.velocityY = self.jumpPower;
+			var jumpStrength = self.jumpPower * (1 + chargeMultiplier);
+			self.velocityY = jumpStrength;
 			self.isGrounded = false;
 			LK.getSound('jump').play();
 		}
 	};
@@ -110,15 +111,51 @@
 var isGameRunning = true;
 var groundLevel = 2400;
 var lastObstacleSpawn = 0;
 var spawnDistance = 300;
+var isCharging = false;
+var chargeStartTime = 0;
+var currentCharge = 0;
+var maxCharge = 100;
+var chargeRate = 2;
 // 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 jump meter background
+var meterBg = LK.getAsset('obstacle', {
+	anchorX: 0,
+	anchorY: 0,
+	scaleX: 4,
+	scaleY: 0.5,
+	tint: 0x333333
+});
+meterBg.x = 100;
+meterBg.y = 150;
+LK.gui.topLeft.addChild(meterBg);
+// Create jump meter fill
+var meterFill = LK.getAsset('obstacle', {
+	anchorX: 0,
+	anchorY: 0,
+	scaleX: 0,
+	scaleY: 0.5,
+	tint: 0x00ff00
+});
+meterFill.x = 100;
+meterFill.y = 150;
+LK.gui.topLeft.addChild(meterFill);
+// Create jump meter label
+var meterLabel = new Text2('JUMP POWER', {
+	size: 40,
+	fill: 0xFFFFFF
+});
+meterLabel.anchor.set(0, 0);
+meterLabel.x = 100;
+meterLabel.y = 100;
+LK.gui.topLeft.addChild(meterLabel);
 // Create bike
 bike = game.addChild(new Bike());
 bike.x = 400;
 bike.y = groundLevel;
@@ -151,17 +188,49 @@
 	ramp.speed = -gameSpeed;
 	ramps.push(ramp);
 	game.addChild(ramp);
 }
-// Game input
+// Game input - start charging
 game.down = function (x, y, obj) {
-	if (isGameRunning) {
-		bike.jump();
+	if (isGameRunning && bike.isGrounded) {
+		isCharging = true;
+		chargeStartTime = LK.ticks;
+		currentCharge = 0;
 	}
 };
+// Game input - release jump
+game.up = function (x, y, obj) {
+	if (isGameRunning && isCharging) {
+		var chargeMultiplier = currentCharge / maxCharge;
+		bike.jump(chargeMultiplier);
+		isCharging = false;
+		currentCharge = 0;
+	}
+};
 // Main game loop
 game.update = function () {
 	if (!isGameRunning) return;
+	// Update jump charge system
+	if (isCharging && bike.isGrounded) {
+		currentCharge += chargeRate;
+		if (currentCharge > maxCharge) {
+			currentCharge = maxCharge;
+		}
+	} else if (!bike.isGrounded) {
+		isCharging = false;
+		currentCharge = 0;
+	}
+	// Update jump meter UI
+	var fillPercent = currentCharge / maxCharge;
+	meterFill.scaleX = 4 * fillPercent;
+	// Change color based on charge level
+	if (fillPercent < 0.3) {
+		meterFill.tint = 0xff0000; // Red
+	} else if (fillPercent < 0.7) {
+		meterFill.tint = 0xffff00; // Yellow
+	} else {
+		meterFill.tint = 0x00ff00; // Green
+	}
 	// Update distance score
 	distanceScore += 1;
 	LK.setScore(Math.floor(distanceScore / 10));
 	scoreTxt.setText('Distance: ' + Math.floor(distanceScore / 10));