/**** 
* 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
****/ 
// --- Biome/level state ---
var currentBiome = 1;
var biomeTransitioning = false;
var biomeTransitionDistance = 10000;
// --- Biome scaling ---
// At biome 1: scale = 1.0, biome 2: 0.8, biome 3: 0.65, biome 4: 0.55, biome 5+: 0.45 (minimum)
function getBiomeScale(biome) {
	// Every 10000m, scale decreases by 5% (0.95x), looping every 40000m
	// biome: 1,2,3,4,5... (biome 1 = 0-9999m, biome 2 = 10000-19999m, etc)
	// At biome 1: 1.0, biome 2: 0.95, biome 3: 0.9025, biome 4: 0.857375, biome 5: 0.81450625, then repeat
	var biomeIndex = (biome - 1) % 4; // 0,1,2,3,0,1,2,3...
	var scale = 1.0;
	for (var i = 0; i < biomeIndex; ++i) {
		scale *= 0.95;
	}
	return scale;
}
var currentBiomeScale = 1.0;
// Explosion effect (for flash)
// Obstacle
// Fuel
// Rocket (player)
// --- Global variables ---
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 = typeof storage.best === "number" && storage.best > 0 ? 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 fuelMax = 100;
var fuelAmount = fuelMax * 0.2; // Yakıt toplandığında %20 doldurur
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);
// Best score UI removed
// Fuel bar (simple text)
var fuelTxt = new Text2('Yakıt: 100%', {
	size: 60,
	fill: 0xff2222
});
fuelTxt.anchor.set(0.5, 0);
// Place fuelTxt below distanceTxt (metre göstergesinin altında)
LK.gui.top.addChild(fuelTxt);
fuelTxt.y = distanceTxt.height + 10;
// --- Fuel Bar UI ---
// Black border (slightly bigger than background)
var fuelBarBorder = LK.getAsset('backgroundImage', {
	width: 68,
	height: 408,
	x: 0,
	y: 0,
	anchorX: 0.5,
	anchorY: 0.0
});
fuelBarBorder.tint = 0x000000;
fuelBarBorder.alpha = 1.0;
// Bar background (light gray, inside border)
var fuelBarBg = LK.getAsset('backgroundImage', {
	width: 60,
	height: 400,
	x: 0,
	y: 4,
	anchorX: 0.5,
	anchorY: 0.0
});
fuelBarBg.tint = 0xeeeeee;
fuelBarBg.alpha = 1.0;
// Bar fill (will be resized from top down)
var fuelBarFill = LK.getAsset('backgroundImage', {
	width: 44,
	height: 392,
	x: 0,
	y: 8,
	anchorX: 0.5,
	anchorY: 0.0
});
fuelBarFill.tint = 0x00ff00; // Start as vivid green
fuelBarFill.alpha = 1.0;
// Container for bar
var fuelBarContainer = new Container();
fuelBarContainer.addChild(fuelBarBorder);
fuelBarContainer.addChild(fuelBarBg);
fuelBarContainer.addChild(fuelBarFill);
// Position bar at top right, with margin from top and right
fuelBarContainer.x = 2048 - 80;
fuelBarContainer.y = 100;
// Add to game (not GUI, so it scales with gameplay)
game.addChild(fuelBarContainer);
// (bestTxt positioning removed)
// --- 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;
	currentBiome = 1;
	biomeTransitioning = false;
	// background and biome2Background removed
	// (best score logic removed)
	// Create rocket
	rocket = new Rocket();
	rocket.x = 2048 / 2;
	rocket.y = 2732 - 350;
	rocket.scaleX = currentBiomeScale;
	rocket.scaleY = currentBiomeScale;
	if (rocket.children && rocket.children.length > 0) {
		rocket.children[0].scaleX = currentBiomeScale;
		rocket.children[0].scaleY = currentBiomeScale;
	}
	game.addChild(rocket);
	rocket.fuel = 100;
	rocket.alive = true;
	gameStarted = true;
	updateUI();
}
function updateUI() {
	distanceTxt.setText(Math.floor(distance) + ' m');
	fuelTxt.setText('Fuel: ' + Math.max(0, Math.floor(rocket ? rocket.fuel : 0)) + '%');
	// Update fuel bar fill
	if (typeof fuelBarFill !== "undefined" && rocket) {
		// Height: 392px max, min 0 (depletes from top to bottom)
		var pct = Math.max(0, Math.min(1, rocket.fuel / fuelMax));
		fuelBarFill.height = 392 * pct;
		// Always keep the top of the fill at the same y (so it shrinks from top)
		fuelBarFill.y = 8 + 392 * (1 - pct);
		// Vivid color gradient: green > yellow > orange > red
		var color;
		if (pct > 0.5) {
			// Interpolate green (0x00ff00) to yellow (0xffff00)
			var t = (pct - 0.5) * 2; // 1 at full, 0 at 0.5
			var r = Math.floor(0x00 + (0xff - 0x00) * (1 - t));
			var g = 0xff;
			var b = 0x00;
			color = r << 16 | g << 8 | b;
		} else if (pct > 0.2) {
			// Interpolate yellow (0xffff00) to orange (0xff8800)
			var t = (pct - 0.2) / 0.3; // 1 at 0.5, 0 at 0.2
			var r = 0xff;
			var g = Math.floor(0x88 + (0xff - 0x88) * t);
			var b = 0x00;
			color = r << 16 | g << 8 | b;
		} else {
			// Interpolate orange (0xff8800) to red (0xff0000)
			var t = pct / 0.2; // 1 at 0.2, 0 at 0
			var r = 0xff;
			var g = Math.floor(0x00 + (0x88 - 0x00) * t);
			var b = 0x00;
			color = r << 16 | g << 8 | b;
		}
		fuelBarFill.tint = color;
	}
}
// --- 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
	// Speed up every 200 meters
	if (!rocket.lastSpeedupDistance) rocket.lastSpeedupDistance = 0;
	if (Math.floor(distance / 200) > Math.floor(rocket.lastSpeedupDistance / 200)) {
		rocketSpeed += 1.5;
		rocket.lastSpeedupDistance = distance;
	}
	// --- Biome/level transition every 10000m ---
	// --- Background color logic by distance ---
	// Smooth biome background color transitions using tweening
	if (typeof game._bgColor === "undefined") game._bgColor = 0x75d1ff;
	if (typeof game._bgColorTarget === "undefined") game._bgColorTarget = 0x75d1ff;
	if (typeof game._bgColorTweening === "undefined") game._bgColorTweening = false;
	function getBiomeBgColor(distance) {
		if (distance < 10000) {
			return 0x75d1ff; // açık mavi
		} else if (distance < 20000) {
			return 0x1e90ff; // mavi
		} else if (distance < 30000) {
			return 0x003366; // koyu mavi
		} else if (distance < 40000) {
			return 0x22232a; // koyu gri
		} else if (distance < 50000) {
			return 0x000000; // siyah
		} else {
			// 50000'den sonra arka plan sürekli renk değiştirsin
			// Renk döngüsü: HSV renk çarkı üzerinde döner
			var t = (distance - 50000) / 400;
			var h = t % 1 * 6;
			var c = 1,
				x = 1 - Math.abs(h % 2 - 1);
			var r = 0,
				g = 0,
				b = 0;
			if (h < 1) {
				r = c;
				g = x;
				b = 0;
			} else if (h < 2) {
				r = x;
				g = c;
				b = 0;
			} else if (h < 3) {
				r = 0;
				g = c;
				b = x;
			} else if (h < 4) {
				r = 0;
				g = x;
				b = c;
			} else if (h < 5) {
				r = x;
				g = 0;
				b = c;
			} else {
				r = c;
				g = 0;
				b = x;
			}
			var m = 0.25;
			r = Math.floor((r + m) / (1 + m) * 255);
			g = Math.floor((g + m) / (1 + m) * 255);
			b = Math.floor((b + m) / (1 + m) * 255);
			return r << 16 | g << 8 | b;
		}
	}
	// Determine which biome we're in
	var biomeIdx = Math.floor(distance / 10000);
	var nextBiomeColor = getBiomeBgColor(distance);
	// If biome color target changed, tween to new color
	if (game._bgColorTarget !== nextBiomeColor && distance < 50000) {
		// Only tween for biome transitions below 50000m, above that we cycle colors
		if (!game._bgColorTweening) {
			var fromColor = game._bgColor;
			var toColor = nextBiomeColor;
			// Decompose colors
			var fromR = fromColor >> 16 & 0xff,
				fromG = fromColor >> 8 & 0xff,
				fromB = fromColor & 0xff;
			var toR = toColor >> 16 & 0xff,
				toG = toColor >> 8 & 0xff,
				toB = toColor & 0xff;
			var colorObj = {
				r: fromR,
				g: fromG,
				b: fromB
			};
			game._bgColorTweening = true;
			game._bgColorTarget = nextBiomeColor;
			tween(colorObj, {
				r: toR,
				g: toG,
				b: toB
			}, {
				duration: 1200,
				easing: tween.cubicInOut,
				onUpdate: function onUpdate(obj) {
					var c = Math.round(obj.r) << 16 | Math.round(obj.g) << 8 | Math.round(obj.b);
					game._bgColor = c;
					game.setBackgroundColor(c);
				},
				onFinish: function onFinish() {
					game._bgColor = nextBiomeColor;
					game.setBackgroundColor(nextBiomeColor);
					game._bgColorTweening = false;
				}
			});
		}
	} else if (distance < 50000) {
		// Not transitioning, just set color
		if (!game._bgColorTweening) {
			game._bgColor = nextBiomeColor;
			game._bgColorTarget = nextBiomeColor;
			game.setBackgroundColor(nextBiomeColor);
		}
	} else {
		// 50000m+ : color cycles, no tween, set instantly
		var cycleColor = getBiomeBgColor(distance);
		game._bgColor = cycleColor;
		game._bgColorTarget = cycleColor;
		game.setBackgroundColor(cycleColor);
	}
	if (!biomeTransitioning && Math.floor(distance / biomeTransitionDistance) + 1 !== currentBiome) {
		biomeTransitioning = true;
		var nextBiome = Math.floor(distance / biomeTransitionDistance) + 1;
		// Slow rocket
		var oldSpeed = rocketSpeed;
		tween({
			v: oldSpeed
		}, {
			v: 6
		}, {
			duration: 1200,
			easing: tween.cubicOut,
			onUpdate: function onUpdate(obj) {
				rocketSpeed = obj.v;
			},
			onFinish: function onFinish() {
				rocketSpeed = 6;
				currentBiome = nextBiome;
				biomeTransitioning = false;
				// --- Scale down rocket, fuels, and obstacles for new biome ---
				var newScale = getBiomeScale(currentBiome);
				if (Math.abs(currentBiomeScale - newScale) > 0.01) {
					currentBiomeScale = newScale;
					// Tween rocket scale
					if (rocket) {
						tween(rocket, {
							scaleX: newScale,
							scaleY: newScale
						}, {
							duration: 600,
							easing: tween.cubicInOut
						});
						// Also scale attached asset if needed
						if (rocket.children && rocket.children.length > 0) {
							tween(rocket.children[0], {
								scaleX: newScale,
								scaleY: newScale
							}, {
								duration: 600,
								easing: tween.cubicInOut
							});
						}
					}
					// Tween all fuels
					for (var i = 0; i < fuels.length; ++i) {
						tween(fuels[i], {
							scaleX: newScale,
							scaleY: newScale
						}, {
							duration: 600,
							easing: tween.cubicInOut
						});
						if (fuels[i].children && fuels[i].children.length > 0) {
							tween(fuels[i].children[0], {
								scaleX: newScale,
								scaleY: newScale
							}, {
								duration: 600,
								easing: tween.cubicInOut
							});
						}
					}
					// Tween all obstacles
					for (var i = 0; i < obstacles.length; ++i) {
						tween(obstacles[i], {
							scaleX: newScale,
							scaleY: newScale
						}, {
							duration: 600,
							easing: tween.cubicInOut
						});
						if (obstacles[i].children && obstacles[i].children.length > 0) {
							tween(obstacles[i].children[0], {
								scaleX: newScale,
								scaleY: newScale
							}, {
								duration: 600,
								easing: tween.cubicInOut
							});
						}
					}
				}
			}
		});
		// background fade logic removed
	}
	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)
		// --- Biome 2: obstacles move horizontally ---
		if (currentBiome === 2) {
			if (typeof o.biome2Dir === "undefined") {
				o.biome2Dir = Math.random() < 0.5 ? -1 : 1;
				o.biome2Speed = 3 + Math.random() * 2;
			}
			o.x += o.biome2Dir * o.biome2Speed;
			// Bounce at screen edges
			if (o.x < minX + o.width / 2) {
				o.x = minX + o.width / 2;
				o.biome2Dir *= -1;
			}
			if (o.x > maxX - o.width / 2) {
				o.x = maxX - o.width / 2;
				o.biome2Dir *= -1;
			}
		}
		if (o.y > maxY + 200) {
			o.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		if (rocket.intersects(o)) {
			// Only lose 10% fuel, don't die instantly
			var lostFuel = fuelMax * 0.10;
			rocket.fuel = Math.max(0, rocket.fuel - lostFuel);
			LK.effects.flashObject(rocket, 0xff4444, 400);
			// --- Rocket collision animation: shake horizontally ---
			// Stop any previous tweens on rocket.x
			tween.stop(rocket, {
				x: true
			});
			var originalX = rocket.x;
			// Animate shake: left, right, center
			tween(rocket, {
				x: originalX - 40
			}, {
				duration: 60,
				easing: tween.cubicOut,
				onFinish: function onFinish() {
					tween(rocket, {
						x: originalX + 40
					}, {
						duration: 90,
						easing: tween.cubicInOut,
						onFinish: function onFinish() {
							tween(rocket, {
								x: originalX
							}, {
								duration: 70,
								easing: tween.cubicIn
							});
						}
					});
				}
			});
			// --- End rocket collision animation ---
			obstacles.splice(i, 1);
			o.destroy();
			updateUI();
			// If fuel is now 0, trigger game over as normal
			if (rocket.fuel <= 0) {
				rocket.fuel = 0;
				rocket.alive = false;
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			}
			continue;
		}
	}
	// Spawn fuel
	fuelTimer++;
	if (fuelTimer >= fuelSpawnInterval) {
		fuelTimer = 0;
		var f = new Fuel();
		f.x = Math.floor(minX + Math.random() * (maxX - minX));
		// Spawn above the visible screen, so they fall into view from the top
		f.y = rocket.y - 2732 / 2 - 200 - Math.random() * 300;
		f.scaleX = currentBiomeScale;
		f.scaleY = currentBiomeScale;
		if (f.children && f.children.length > 0) {
			f.children[0].scaleX = currentBiomeScale;
			f.children[0].scaleY = currentBiomeScale;
		}
		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));
		// Spawn above the visible screen, so they fall into view from the top
		o.y = rocket.y - 2732 / 2 - 400 - Math.random() * 400;
		o.scaleX = currentBiomeScale;
		o.scaleY = currentBiomeScale;
		if (o.children && o.children.length > 0) {
			o.children[0].scaleX = currentBiomeScale;
			o.children[0].scaleY = currentBiomeScale;
		}
		game.addChild(o);
		obstacles.push(o);
	}
};
// --- Game over / win handling ---
LK.on('gameover', function () {
	gameStarted = false;
	updateUI();
	// (best score display removed)
	LK.setTimeout(function () {
		resetGame();
	}, 1200);
});
// --- Start game ---
resetGame();

===================================================================
--- original.js
+++ change.js
@@ -118,9 +118,9 @@
 // Best score UI removed
 // Fuel bar (simple text)
 var fuelTxt = new Text2('Yakıt: 100%', {
 	size: 60,
-	fill: 0x000000
+	fill: 0xff2222
 });
 fuelTxt.anchor.set(0.5, 0);
 // Place fuelTxt below distanceTxt (metre göstergesinin altında)
 LK.gui.top.addChild(fuelTxt);