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

/**** 
* Classes
****/ 
// Enemy Car
var EnemyCar = Container.expand(function () {
	var self = Container.call(this);
	var car = self.attachAsset('enemyCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = car.width;
	self.height = car.height;
	self.speed = 0;
	// For collision
	self.lane = 0;
	return self;
});
// Fuel Can
var FuelCan = Container.expand(function () {
	var self = Container.call(this);
	var can = self.attachAsset('fuelCan', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = can.width;
	self.height = can.height;
	self.speed = 0;
	return self;
});
// Lane Mark
var LaneMark = Container.expand(function () {
	var self = Container.call(this);
	var mark = self.attachAsset('laneMark', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = mark.width;
	self.height = mark.height;
	self.speed = 0;
	return self;
});
// Player Car
var PlayerCar = Container.expand(function () {
	var self = Container.call(this);
	var car = self.attachAsset('playerCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For collision box, use car asset size
	self.width = car.width;
	self.height = car.height;
	// For touch drag
	self.isDragging = false;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222222
});

/**** 
* Game Code
****/ 
// Road background
// Car (player)
// Enemy car
// Fuel can
// Road lane
// Road background (gray)
var roadBg = LK.getAsset('roadBg', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.addChild(roadBg);
// Lane setup
var NUM_LANES = 4;
var LANE_WIDTH = 350;
var ROAD_WIDTH = NUM_LANES * LANE_WIDTH;
var ROAD_LEFT = (2048 - ROAD_WIDTH) / 2;
var ROAD_RIGHT = ROAD_LEFT + ROAD_WIDTH;
// Lane marks
var laneMarks = [];
for (var i = 1; i < NUM_LANES; i++) {
	for (var j = 0; j < 8; j++) {
		var mark = new LaneMark();
		mark.x = ROAD_LEFT + i * LANE_WIDTH;
		mark.y = j * 400;
		mark.speed = 0;
		laneMarks.push(mark);
		game.addChild(mark);
	}
}
// Player car
var player = new PlayerCar();
player.x = 2048 / 2;
player.y = 2732 - 400;
game.addChild(player);
// Fuel bar
var fuelMax = 100;
var fuel = fuelMax;
var fuelBarBg = LK.getAsset('laneMark', {
	width: 600,
	height: 40,
	color: 0x222222,
	anchorX: 0,
	anchorY: 0
});
var fuelBar = LK.getAsset('laneMark', {
	width: 600,
	height: 40,
	color: 0x4caf50,
	anchorX: 0,
	anchorY: 0
});
fuelBarBg.x = 2048 / 2 - 300;
fuelBarBg.y = 80;
fuelBar.x = 2048 / 2 - 300;
fuelBar.y = 80;
game.addChild(fuelBarBg);
game.addChild(fuelBar);
// Score
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Game state
var enemyCars = [];
var fuelCans = [];
var speed = 22; // Initial speed (pixels per frame)
var ticksSinceLastEnemy = 0;
var ticksSinceLastFuel = 0;
var gameOver = false;
// Touch controls
var dragStartX = 0;
var dragStartPlayerX = 0;
var dragActive = false;
// Touch area for left/right controls (full screen)
game.down = function (x, y, obj) {
	// Only allow drag if touch is on lower half of screen
	if (y > 1200) {
		dragActive = true;
		dragStartX = x;
		dragStartPlayerX = player.x;
	}
};
game.move = function (x, y, obj) {
	if (dragActive) {
		var dx = x - dragStartX;
		var newX = dragStartPlayerX + dx;
		// Clamp to road
		var minX = ROAD_LEFT + player.width / 2;
		var maxX = ROAD_RIGHT - player.width / 2;
		if (newX < minX) newX = minX;
		if (newX > maxX) newX = maxX;
		player.x = newX;
	}
};
game.up = function (x, y, obj) {
	dragActive = false;
};
// Helper: spawn enemy car
function spawnEnemyCar() {
	var enemy = new EnemyCar();
	// Random lane
	var lane = Math.floor(Math.random() * NUM_LANES);
	enemy.lane = lane;
	enemy.x = ROAD_LEFT + LANE_WIDTH / 2 + lane * LANE_WIDTH;
	enemy.y = -200;
	// Speed: base + random
	enemy.speed = speed + Math.floor(Math.random() * 6);
	enemyCars.push(enemy);
	game.addChild(enemy);
}
// Helper: spawn fuel can
function spawnFuelCan() {
	var can = new FuelCan();
	// Random lane
	var lane = Math.floor(Math.random() * NUM_LANES);
	can.x = ROAD_LEFT + LANE_WIDTH / 2 + lane * LANE_WIDTH;
	can.y = -100;
	can.speed = speed;
	fuelCans.push(can);
	game.addChild(can);
}
// Helper: update fuel bar
function updateFuelBar() {
	var w = Math.floor(600 * (fuel / fuelMax));
	if (w < 0) w = 0;
	fuelBar.width = w;
}
// Helper: game over
function triggerGameOver() {
	if (!gameOver) {
		gameOver = true;
		LK.effects.flashScreen(0xff0000, 800);
		LK.showGameOver();
	}
}
// Main game loop
game.update = function () {
	if (gameOver) return;
	// Move lane marks (simulate road movement)
	for (var i = 0; i < laneMarks.length; i++) {
		var mark = laneMarks[i];
		mark.y += speed;
		if (mark.y > 2732) {
			mark.y -= 3200;
		}
	}
	// Spawn enemy cars
	ticksSinceLastEnemy++;
	var enemyInterval = Math.max(24, 60 - Math.floor(score / 10)); // Faster as score increases
	if (ticksSinceLastEnemy >= enemyInterval) {
		spawnEnemyCar();
		ticksSinceLastEnemy = 0;
	}
	// Spawn fuel cans
	ticksSinceLastFuel++;
	var fuelInterval = 180 + Math.floor(Math.random() * 120);
	if (ticksSinceLastFuel >= fuelInterval) {
		spawnFuelCan();
		ticksSinceLastFuel = 0;
	}
	// Move enemy cars
	for (var i = enemyCars.length - 1; i >= 0; i--) {
		var enemy = enemyCars[i];
		enemy.y += enemy.speed;
		// Remove if off screen
		if (enemy.y > 2900) {
			enemy.destroy();
			enemyCars.splice(i, 1);
			// Score for passing car
			score += 1;
			scoreTxt.setText(score);
			// Increase speed every 10 points
			if (score % 10 === 0 && speed < 40) {
				speed += 2;
			}
			continue;
		}
		// Collision with player
		if (enemy.intersects(player)) {
			triggerGameOver();
			return;
		}
	}
	// Move fuel cans
	for (var i = fuelCans.length - 1; i >= 0; i--) {
		var can = fuelCans[i];
		can.y += can.speed;
		// Remove if off screen
		if (can.y > 2900) {
			can.destroy();
			fuelCans.splice(i, 1);
			continue;
		}
		// Collision with player
		if (can.intersects(player)) {
			fuel += 30;
			if (fuel > fuelMax) fuel = fuelMax;
			updateFuelBar();
			can.destroy();
			fuelCans.splice(i, 1);
			continue;
		}
		// Do NOT trigger game over if player misses fuel can
	}
	// Fuel consumption
	fuel -= 0.18 + speed * 0.008;
	if (fuel < 0) fuel = 0;
	updateFuelBar();
	// Out of fuel
	if (fuel <= 0) {
		triggerGameOver();
		return;
	}
};
// Initial UI
scoreTxt.setText(score);
updateFuelBar();

===================================================================
--- original.js
+++ change.js
@@ -68,14 +68,14 @@
 
 /**** 
 * Game Code
 ****/ 
-// Road background (gray)
-// Road lane
-// Fuel can
-// Enemy car
-// Car (player)
 // Road background
+// Car (player)
+// Enemy car
+// Fuel can
+// Road lane
+// Road background (gray)
 var roadBg = LK.getAsset('roadBg', {
 	anchorX: 0,
 	anchorY: 0,
 	x: 0,
@@ -275,8 +275,9 @@
 			can.destroy();
 			fuelCans.splice(i, 1);
 			continue;
 		}
+		// Do NOT trigger game over if player misses fuel can
 	}
 	// Fuel consumption
 	fuel -= 0.18 + speed * 0.008;
 	if (fuel < 0) fuel = 0;