/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	best: 0
});

/**** 
* Classes
****/ 
// Fuel class
var Fuel = Container.expand(function () {
	var self = Container.call(this);
	var fuelGfx = self.attachAsset('fuel', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = fuelGfx.width;
	self.height = fuelGfx.height;
	self.update = function () {
		// Movement handled in game.update
	};
	return self;
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obsGfx = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = obsGfx.width;
	self.height = obsGfx.height;
	self.update = function () {
		// Movement handled in game.update
	};
	return self;
});
// Rocket class
var Rocket = Container.expand(function () {
	var self = Container.call(this);
	var rocketGfx = self.attachAsset('rocket', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = rocketGfx.width;
	self.height = rocketGfx.height;
	self.fuel = 100; // percent
	self.alive = true;
	self.update = function () {
		// Nothing here, movement handled in game.update
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// --- Global variables ---
// Rocket (player)
// Fuel
// Obstacle
// Explosion effect (for flash)
var rocket;
var fuels = [];
var obstacles = [];
var dragStartX = null;
var dragRocketStartX = null;
var isDragging = false;
var fuelTimer = 0;
var obstacleTimer = 0;
var distance = 0;
var best = storage.best || 0;
var fuelDepleteRate = 0.18; // per tick
var rocketSpeed = 8; // px per tick (vertical)
var fuelSpawnInterval = 90; // ticks
var obstacleSpawnInterval = 110; // ticks
var minX = 100,
	maxX = 2048 - 100;
var minY = 200,
	maxY = 2732 - 200;
var fuelAmount = 35; // how much fuel a fuel gives
var fuelMax = 100;
var gameStarted = false;
// --- UI ---
var distanceTxt = new Text2('0 m', {
	size: 90,
	fill: 0xFFFFFF
});
distanceTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(distanceTxt);
var bestTxt = new Text2('Best: 0 m', {
	size: 60,
	fill: 0xFFFF00
});
bestTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(bestTxt);
// Fuel bar (simple text)
var fuelTxt = new Text2('Yakıt: 100%', {
	size: 60,
	fill: 0x44DDEE
});
fuelTxt.anchor.set(0, 0);
LK.gui.top.addChild(fuelTxt);
// --- Helper functions ---
function resetGame() {
	// Remove old objects
	if (rocket) rocket.destroy();
	for (var i = 0; i < fuels.length; ++i) fuels[i].destroy();
	for (var i = 0; i < obstacles.length; ++i) obstacles[i].destroy();
	fuels = [];
	obstacles = [];
	// Reset variables
	distance = 0;
	fuelTimer = 0;
	obstacleTimer = 0;
	// Create rocket
	rocket = new Rocket();
	rocket.x = 2048 / 2;
	rocket.y = 2732 - 350;
	game.addChild(rocket);
	rocket.fuel = 100;
	rocket.alive = true;
	gameStarted = true;
	updateUI();
}
function updateUI() {
	distanceTxt.setText(Math.floor(distance) + ' m');
	bestTxt.setText('Best: ' + Math.floor(best) + ' m');
	fuelTxt.setText('Yakıt: ' + Math.max(0, Math.floor(rocket ? rocket.fuel : 0)) + '%');
}
// --- Input (drag to move rocket) ---
game.down = function (x, y, obj) {
	if (!rocket || !rocket.alive) return;
	isDragging = true;
	dragStartX = x;
	dragRocketStartX = rocket.x;
};
game.move = function (x, y, obj) {
	if (!rocket || !rocket.alive) return;
	if (isDragging) {
		var dx = x - dragStartX;
		rocket.x = Math.max(minX, Math.min(maxX, dragRocketStartX + dx));
	}
};
game.up = function (x, y, obj) {
	isDragging = false;
};
// --- Main game loop ---
game.update = function () {
	if (!rocket || !rocket.alive) return;
	// Move rocket up (rocket stays at same y, background moves down)
	// (Handled by moving all objects up, not down!)
	// Distance increases as if rocket is moving up
	distance += rocketSpeed / 6; // scale to meters
	updateUI();
	// Deplete fuel
	rocket.fuel -= fuelDepleteRate;
	if (rocket.fuel <= 0) {
		rocket.fuel = 0;
		rocket.alive = false;
		LK.effects.flashScreen(0xff0000, 800);
		LK.showGameOver();
		return;
	}
	// Move fuels and check collision
	for (var i = fuels.length - 1; i >= 0; --i) {
		var f = fuels[i];
		f.y += rocketSpeed; // move up relative to rocket (background moves down)
		if (f.y > maxY + 200) {
			f.destroy();
			fuels.splice(i, 1);
			continue;
		}
		if (rocket.intersects(f)) {
			rocket.fuel = Math.min(fuelMax, rocket.fuel + fuelAmount);
			f.destroy();
			fuels.splice(i, 1);
			// Small flash effect
			LK.effects.flashObject(rocket, 0x44ddee, 300);
			updateUI();
		}
	}
	// Move obstacles and check collision
	for (var i = obstacles.length - 1; i >= 0; --i) {
		var o = obstacles[i];
		o.y += rocketSpeed; // move up relative to rocket (background moves down)
		if (o.y > maxY + 200) {
			o.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		if (rocket.intersects(o)) {
			rocket.alive = false;
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
	}
	// Spawn fuel
	fuelTimer++;
	if (fuelTimer >= fuelSpawnInterval) {
		fuelTimer = 0;
		var f = new Fuel();
		f.x = Math.floor(minX + Math.random() * (maxX - minX));
		f.y = rocket.y - 900 - Math.random() * 400;
		game.addChild(f);
		fuels.push(f);
	}
	// Spawn obstacle
	obstacleTimer++;
	if (obstacleTimer >= obstacleSpawnInterval) {
		obstacleTimer = 0;
		var o = new Obstacle();
		o.x = Math.floor(minX + Math.random() * (maxX - minX));
		o.y = rocket.y - 700 - Math.random() * 600;
		game.addChild(o);
		obstacles.push(o);
	}
};
// --- Game over / win handling ---
LK.on('gameover', function () {
	gameStarted = false;
	if (distance > best) {
		best = distance;
		storage.best = Math.floor(best);
	}
	updateUI();
	LK.setTimeout(function () {
		resetGame();
	}, 1200);
});
// --- Start game ---
resetGame();

===================================================================
--- original.js
+++ change.js
@@ -63,25 +63,13 @@
 
 /**** 
 * Game Code
 ****/ 
-// Explosion effect (for flash)
-// Obstacle
-// Fuel
-// Rocket (player)
 // --- Global variables ---
-// Background
-var bg = LK.getAsset('explosion', {
-	// using 'explosion' as a placeholder for a big ellipse background
-	anchorX: 0.5,
-	anchorY: 0.5,
-	scaleX: 20,
-	scaleY: 20,
-	x: 2048 / 2,
-	y: 2732 / 2
-});
-game.addChild(bg);
-var bgScroll = 0;
+// Rocket (player)
+// Fuel
+// Obstacle
+// Explosion effect (for flash)
 var rocket;
 var fuels = [];
 var obstacles = [];
 var dragStartX = null;
@@ -169,22 +157,10 @@
 // --- Main game loop ---
 game.update = function () {
 	if (!rocket || !rocket.alive) return;
 	// Move rocket up (rocket stays at same y, background moves down)
-	var bgMove = rocketSpeed;
-	// Scroll background
-	bgScroll += bgMove;
-	bg.y += bgMove;
-	if (bg.y > 2732 + 1000) {
-		// reset background position if it goes too far
-		bg.y = -1000;
-	}
-	for (var i = 0; i < fuels.length; ++i) {
-		fuels[i].y += bgMove;
-	}
-	for (var i = 0; i < obstacles.length; ++i) {
-		obstacles[i].y += bgMove;
-	}
+	// (Handled by moving all objects up, not down!)
+	// Distance increases as if rocket is moving up
 	distance += rocketSpeed / 6; // scale to meters
 	updateUI();
 	// Deplete fuel
 	rocket.fuel -= fuelDepleteRate;
@@ -197,10 +173,10 @@
 	}
 	// Move fuels and check collision
 	for (var i = fuels.length - 1; i >= 0; --i) {
 		var f = fuels[i];
-		f.y -= rocketSpeed; // move up with rocket
-		if (f.y < -100) {
+		f.y += rocketSpeed; // move up relative to rocket (background moves down)
+		if (f.y > maxY + 200) {
 			f.destroy();
 			fuels.splice(i, 1);
 			continue;
 		}
@@ -215,10 +191,10 @@
 	}
 	// Move obstacles and check collision
 	for (var i = obstacles.length - 1; i >= 0; --i) {
 		var o = obstacles[i];
-		o.y -= rocketSpeed; // move up with rocket
-		if (o.y < -100) {
+		o.y += rocketSpeed; // move up relative to rocket (background moves down)
+		if (o.y > maxY + 200) {
 			o.destroy();
 			obstacles.splice(i, 1);
 			continue;
 		}