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

/**** 
* Classes
****/ 
// Coin
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coin = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = coin.width;
	self.height = coin.height;
	self.speed = 20;
	self.lane = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// 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 = 20 + Math.random() * 5;
	self.lane = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Enemy Car 2
var EnemyCar2 = Container.expand(function () {
	var self = Container.call(this);
	var car = self.attachAsset('enemyCar2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = car.width;
	self.height = car.height;
	self.speed = 22 + Math.random() * 6;
	self.lane = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Enemy Car 3
var EnemyCar3 = Container.expand(function () {
	var self = Container.call(this);
	var car = self.attachAsset('enemyCar3', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = car.width;
	self.height = car.height;
	self.speed = 18 + Math.random() * 8;
	self.lane = 1;
	self.update = function () {
		self.y += self.speed;
	};
	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
	});
	self.width = car.width;
	self.height = car.height;
	self.lane = 1; // 0: left, 1: center, 2: right
	self.invincible = false;
	self.update = function () {
		// No movement here; handled by input
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Button assets for Start and Choose Car
// Road and lanes setup
var roadWidth = 900;
var laneCount = 3;
var laneWidth = roadWidth / laneCount;
var roadX = (2048 - roadWidth) / 2;
var roadY = 0;
// --- Car Selection and Start Menu ---
var carAssetIds = ['playerCar',
// default
'car2', 'car3', 'car4', 'car5', 'car6', 'car7', 'car8', 'car9', 'car10', 'car11', 'car12', 'car13', 'car14', 'car15', 'car16'];
// Register 8 more car assets (IDs: car9 to car16)
// Store selected car index (default 0)
var selectedCarIndex = 0;
// Overlay containers for menu and car select
var startMenuOverlay = new Container();
var carSelectOverlay = new Container();
// --- Start Menu UI ---
var titleTxt = new Text2('Turbo Racer 3', {
	size: 180,
	fill: "#fff"
});
titleTxt.anchor.set(0.5, 0.5);
titleTxt.x = 2048 / 2;
titleTxt.y = 600;
// Start Button
var startBtn = LK.getAsset('startBtnImg', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 1000
});
var startBtnLabel = new Text2('Start', {
	size: 90,
	fill: "#222"
});
startBtnLabel.anchor.set(0.5, 0.5);
startBtnLabel.x = startBtn.x;
startBtnLabel.y = startBtn.y;
// Choose Car Button
var chooseCarBtn = LK.getAsset('chooseCarBtnImg', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 1200
});
var chooseCarBtnLabel = new Text2('Choose a Car', {
	size: 70,
	fill: "#222"
});
chooseCarBtnLabel.anchor.set(0.5, 0.5);
chooseCarBtnLabel.x = chooseCarBtn.x;
chooseCarBtnLabel.y = chooseCarBtn.y;
// Adventure Mode Button
var adventureBtn = LK.getAsset('adventureBtnImg', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 1400
});
var adventureBtnLabel = new Text2('Adventure Mode', {
	size: 70,
	fill: "#222"
});
adventureBtnLabel.anchor = {
	x: 0.5,
	y: 0.5
};
adventureBtnLabel.x = adventureBtn.x;
adventureBtnLabel.y = adventureBtn.y;
// Add to overlay
startMenuOverlay.addChild(titleTxt);
startMenuOverlay.addChild(startBtn);
startMenuOverlay.addChild(startBtnLabel);
startMenuOverlay.addChild(chooseCarBtn);
startMenuOverlay.addChild(chooseCarBtnLabel);
startMenuOverlay.addChild(adventureBtn);
startMenuOverlay.addChild(adventureBtnLabel);
game.addChild(startMenuOverlay);
// --- Adventure Mode Overlay ---
var adventureOverlay = new Container();
var adventureTitle = new Text2('Adventure Mode', {
	size: 120,
	fill: "#fff"
});
adventureTitle.anchor.set(0.5, 0.5);
adventureTitle.x = 2048 / 2;
adventureTitle.y = 400;
adventureOverlay.addChild(adventureTitle);
// Section grid (6 columns x 5 rows = 30 sections)
var sectionCols = 6;
var sectionRows = 5;
var sectionCount = 30;
var sectionSpacingX = 250;
var sectionSpacingY = 220;
var sectionStartX = 2048 / 2 - (sectionCols - 1) * sectionSpacingX / 2;
var sectionStartY = 700;
var sectionIcons = [];
// Persistent progress using storage plugin
var unlockedSections = storage.unlockedSections || 1; // Always at least 1 unlocked
for (var i = 0; i < sectionCount; i++) {
	var col = i % sectionCols;
	var row = Math.floor(i / sectionCols);
	var sectionIcon = LK.getAsset('sectionIcon', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: sectionStartX + col * sectionSpacingX,
		y: sectionStartY + row * sectionSpacingY
	});
	var sectionLabel = new Text2('' + (i + 1), {
		size: 60,
		fill: "#fff"
	});
	sectionLabel.anchor.set(0.5, 0.5);
	sectionLabel.x = sectionIcon.x;
	sectionLabel.y = sectionIcon.y;
	// Lock icon overlay if locked
	var isUnlocked = i < unlockedSections;
	var lockIcon = null;
	if (!isUnlocked) {
		lockIcon = LK.getAsset('star1', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: sectionIcon.x,
			y: sectionIcon.y,
			scaleX: 1.1,
			scaleY: 1.1
		});
		lockIcon.alpha = 0.7;
		adventureOverlay.addChild(lockIcon);
	}
	// Section icon click handler
	(function (idx, icon, label, locked, lockIconRef) {
		icon.down = function () {
			if (locked) {
				// Optionally: flash or shake to indicate locked
				LK.effects.flashObject(icon, 0xff0000, 400);
				return;
			}
			// Start adventure section idx+1
			if (adventureOverlay.parent) adventureOverlay.destroy();
			startAdventureSection(idx + 1);
		};
		label.down = icon.down;
		if (lockIconRef) lockIconRef.down = icon.down;
	})(i, sectionIcon, sectionLabel, !isUnlocked, lockIcon);
	adventureOverlay.addChild(sectionIcon);
	adventureOverlay.addChild(sectionLabel);
	sectionIcons.push(sectionIcon);
}
// Back button for adventure overlay
var adventureBackBtn = new Text2('Back', {
	size: 80,
	fill: "#fff"
});
adventureBackBtn.anchor.set(0.5, 0.5);
adventureBackBtn.x = 2048 / 2;
adventureBackBtn.y = sectionStartY + sectionRows * sectionSpacingY + 100;
adventureOverlay.addChild(adventureBackBtn);
// Adventure button handler
adventureBtn.down = function () {
	if (startMenuOverlay.parent) startMenuOverlay.destroy();
	game.addChild(adventureOverlay);
};
// Back button handler
adventureBackBtn.down = function () {
	if (adventureOverlay.parent) adventureOverlay.destroy();
	game.addChild(startMenuOverlay);
};
// --- Car Selection UI ---
var carSelectTitle = new Text2('Select Your Car', {
	size: 120,
	fill: "#fff"
});
carSelectTitle.anchor.set(0.5, 0.5);
carSelectTitle.x = 2048 / 2;
carSelectTitle.y = 400;
carSelectOverlay.addChild(carSelectTitle);
var carIcons = [];
var carIconSpacing = 220;
var carIconsPerRow = Math.ceil(carAssetIds.length / 2);
var carIconStartX = 2048 / 2 - (carIconsPerRow - 1) * carIconSpacing / 2;
var carIconY1 = 800;
var carIconY2 = 1250; // Increased spacing between rows
for (var i = 0; i < carAssetIds.length; i++) {
	var row = i < carIconsPerRow ? 0 : 1;
	var col = row === 0 ? i : i - carIconsPerRow;
	var carIcon = LK.getAsset(carAssetIds[i], {
		anchorX: 0.5,
		anchorY: 0.5,
		x: carIconStartX + col * carIconSpacing,
		y: row === 0 ? carIconY1 : carIconY2,
		scaleX: 0.7,
		scaleY: 0.7
	});
	// Highlight border for selected
	carIcon._border = null;
	(function (idx, icon) {
		icon.down = function () {
			// Remove highlight from all
			for (var j = 0; j < carIcons.length; j++) {
				if (carIcons[j]._border) {
					carIcons[j]._border.destroy();
					carIcons[j]._border = null;
				}
			}
			// Add highlight (no border, just set selectedCarIndex)
			selectedCarIndex = idx;
			// Animate icon to grow a little when selected
			tween(icon, {
				scaleX: 0.9,
				scaleY: 0.9
			}, {
				duration: 180,
				easing: tween.cubicOut
			});
			// Shrink all other icons back to normal
			for (var j = 0; j < carIcons.length; j++) {
				if (carIcons[j] !== icon) {
					tween(carIcons[j], {
						scaleX: 0.7,
						scaleY: 0.7
					}, {
						duration: 180,
						easing: tween.cubicOut
					});
				}
			}
		};
	})(i, carIcon);
	carIcons.push(carIcon);
	carSelectOverlay.addChild(carIcon);
}
// Preselect first car
carIcons[0].down();
// Confirm button
var confirmBtn = new Text2('Confirm', {
	size: 100,
	fill: "#fff"
});
confirmBtn.anchor.set(0.5, 0.5);
confirmBtn.x = 2048 / 2;
// Place confirmBtn below the second row of car icons
var carIconY = carIconY2; // Use the y of the second row
confirmBtn.y = carIconY + 300;
carSelectOverlay.addChild(confirmBtn);
// --- Menu Button Handlers ---
startBtn.down = function () {
	// Remove overlays, start game
	if (startMenuOverlay.parent) startMenuOverlay.destroy();
	if (carSelectOverlay.parent) carSelectOverlay.destroy();
	// Remove all start menu UI text and buttons
	if (titleTxt.parent) titleTxt.destroy();
	if (startBtn.parent) startBtn.destroy();
	if (startBtnLabel.parent) startBtnLabel.destroy();
	if (chooseCarBtn.parent) chooseCarBtn.destroy();
	if (chooseCarBtnLabel.parent) chooseCarBtnLabel.destroy();
	if (adventureBtn.parent) adventureBtn.destroy();
	if (adventureBtnLabel.parent) adventureBtnLabel.destroy();
	startGame();
};
chooseCarBtn.down = function () {
	if (startMenuOverlay.parent) startMenuOverlay.destroy();
	game.addChild(carSelectOverlay);
};
confirmBtn.down = function () {
	if (carSelectOverlay.parent) carSelectOverlay.destroy();
	game.addChild(startMenuOverlay);
};
// --- Game Start Logic ---
var mainMenuBtn; // Main menu button for normal mode
function startGame() {
	startAdventureSection(null);
	// Add main menu icon in upper left for normal mode
	if (typeof mainMenuBtn !== "undefined" && mainMenuBtn.parent) mainMenuBtn.destroy();
	mainMenuBtn = LK.getAsset('mainMenuBtnImg', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 100,
		y: 180,
		scaleX: 0.7,
		scaleY: 0.7
	});
	mainMenuBtn.alpha = 0.95;
	LK.gui.topLeft.addChild(mainMenuBtn);
	// On press, return to main menu
	mainMenuBtn.down = function () {
		if (typeof mainMenuBtn !== "undefined" && mainMenuBtn.parent) mainMenuBtn.destroy();
		if (typeof scoreTxt !== "undefined" && scoreTxt.parent) scoreTxt.destroy();
		if (typeof sectionLabelTxt !== "undefined" && sectionLabelTxt.parent) sectionLabelTxt.destroy();
		// Remove all game objects
		if (typeof player !== "undefined" && player && player.parent) player.destroy();
		for (var i = 0; i < enemies.length; i++) if (enemies[i].parent) enemies[i].destroy();
		for (var i = 0; i < coins.length; i++) if (coins[i].parent) coins[i].destroy();
		enemies = [];
		coins = [];
		// Show main menu overlay
		game.addChild(startMenuOverlay);
		// Pause game logic while main menu is open
		var prevUpdate = game.update;
		game.update = function () {};
		// When the start menu overlay is closed (startBtn or chooseCarBtn), restore game.update
		var _resumeGameLogic = function resumeGameLogic() {
			if (game.update === _resumeGameLogic) return; // Prevent double restore
			game.update = prevUpdate;
		};
		var _oldStartBtnDown = startBtn.down;
		startBtn.down = function () {
			_resumeGameLogic();
			if (_oldStartBtnDown) _oldStartBtnDown();
		};
		var _oldChooseCarBtnDown = chooseCarBtn.down;
		chooseCarBtn.down = function () {
			_resumeGameLogic();
			if (_oldChooseCarBtnDown) _oldChooseCarBtnDown();
		};
	};
}
// --- Adventure Section Start Logic ---
function startAdventureSection(sectionNumber) {
	// Remove overlays if present
	if (startMenuOverlay.parent) startMenuOverlay.destroy();
	if (carSelectOverlay.parent) carSelectOverlay.destroy();
	if (adventureOverlay.parent) adventureOverlay.destroy();
	// Remove any previous game objects
	if (typeof player !== "undefined" && player && player.parent) player.destroy();
	for (var i = 0; i < enemies.length; i++) if (enemies[i].parent) enemies[i].destroy();
	for (var i = 0; i < coins.length; i++) if (coins[i].parent) coins[i].destroy();
	enemies = [];
	coins = [];
	// Road background
	var road = LK.getAsset('road', {
		anchorX: 0,
		anchorY: 0,
		x: roadX,
		y: roadY
	});
	game.addChild(road);
	// Player car
	player = new PlayerCar();
	player.x = roadX + laneWidth * 1.5;
	player.y = 2732 - 400;
	player.setCarAsset(carAssetIds[selectedCarIndex]);
	game.addChild(player);
	// Section number for adventure mode, null means normal mode
	game.currentSection = sectionNumber;
	// Score and fuel UI
	score = 0;
	distance = 0;
	coinsCollected = 0;
	scoreTxt = new Text2('Score: 0', {
		size: 90,
		fill: "#fff"
	});
	// Place score above (top center) in adventure mode, else top right
	if (sectionNumber) {
		scoreTxt.anchor.set(0.5, 0); // top center
		scoreTxt.x = 2048 / 2;
		scoreTxt.y = 20;
	} else {
		scoreTxt.anchor.set(1, 0); // top right
		scoreTxt.x = 2048 - 100;
		scoreTxt.y = 20;
	}
	LK.gui.top.addChild(scoreTxt);
	// Section label for adventure mode
	if (sectionNumber) {
		if (typeof sectionLabelTxt !== "undefined" && sectionLabelTxt.parent) sectionLabelTxt.destroy();
		sectionLabelTxt = new Text2('Section ' + sectionNumber, {
			size: 80,
			fill: 0xFFD600
		});
		sectionLabelTxt.anchor.set(0, 0);
		sectionLabelTxt.x = 120;
		sectionLabelTxt.y = 20;
		LK.gui.top.addChild(sectionLabelTxt);
	} else {
		if (typeof sectionLabelTxt !== "undefined" && sectionLabelTxt.parent) sectionLabelTxt.destroy();
	}
	// Timer to update score every second
	if (typeof scoreUpdateTimer !== "undefined") LK.clearInterval(scoreUpdateTimer);
	scoreUpdateTimer = LK.setInterval(function () {
		scoreTxt.setText('Score: ' + score);
	}, 1000);
	// Lane positions
	lanePositions = [roadX + laneWidth * 0.5, roadX + laneWidth * 1.5, roadX + laneWidth * 2.5];
	// Place finish line for adventure mode
	if (sectionNumber) {
		// Make each section a bit longer and more difficult
		// Section 1: base distance, base speeds; Section 2: longer, faster, etc.
		var baseFinishDistance = 2732 * 1.5;
		var finishDistance = baseFinishDistance + (sectionNumber - 1) * 600; // Each section is 600px longer
		finishLineY = -finishDistance;
		if (typeof finishLine !== "undefined" && finishLine.parent) finishLine.destroy();
		finishLine = LK.getAsset('finishLine', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: 2048 / 2,
			y: finishLineY
		});
		game.addChild(finishLine);
		finishLine.crossed = false;
		// Set difficulty scaling for this section
		game.adventureDifficulty = 1 + (sectionNumber - 1) * 0.12; // 12% harder per section
		// Add Exit button for adventure mode
		if (typeof adventureExitBtn !== "undefined" && adventureExitBtn.parent) adventureExitBtn.destroy();
		adventureExitBtn = new Text2('Exit', {
			size: 80,
			fill: "#fff"
		});
		adventureExitBtn.anchor.set(1, 0);
		adventureExitBtn.x = 2048 - 100;
		adventureExitBtn.y = 120;
		LK.gui.top.addChild(adventureExitBtn);
		adventureExitBtn.down = function () {
			// Remove overlays and return to adventure section select
			if (typeof sectionLabelTxt !== "undefined" && sectionLabelTxt.parent) sectionLabelTxt.destroy();
			if (typeof scoreTxt !== "undefined" && scoreTxt.parent) scoreTxt.destroy();
			if (typeof adventureExitBtn !== "undefined" && adventureExitBtn.parent) adventureExitBtn.destroy();
			if (typeof finishLine !== "undefined" && finishLine.parent) finishLine.destroy();
			// Remove all game objects
			if (typeof player !== "undefined" && player && player.parent) player.destroy();
			for (var i = 0; i < enemies.length; i++) if (enemies[i].parent) enemies[i].destroy();
			for (var i = 0; i < coins.length; i++) if (coins[i].parent) coins[i].destroy();
			enemies = [];
			coins = [];
			// Show adventure section select overlay
			game.addChild(adventureOverlay);
			// Pause game logic
			game.update = function () {};
		};
		// Add main menu button for adventure mode in upper left
		if (typeof adventureMenuBtn !== "undefined" && adventureMenuBtn.parent) adventureMenuBtn.destroy();
		adventureMenuBtn = LK.getAsset('mainMenuBtnImg', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: 100,
			y: 180,
			scaleX: 0.7,
			scaleY: 0.7
		});
		adventureMenuBtn.alpha = 0.95;
		LK.gui.topLeft.addChild(adventureMenuBtn);
		adventureMenuBtn.down = function () {
			if (typeof adventureMenuBtn !== "undefined" && adventureMenuBtn.parent) adventureMenuBtn.destroy();
			if (typeof scoreTxt !== "undefined" && scoreTxt.parent) scoreTxt.destroy();
			if (typeof sectionLabelTxt !== "undefined" && sectionLabelTxt.parent) sectionLabelTxt.destroy();
			if (typeof adventureExitBtn !== "undefined" && adventureExitBtn.parent) adventureExitBtn.destroy();
			if (typeof finishLine !== "undefined" && finishLine.parent) finishLine.destroy();
			if (typeof player !== "undefined" && player && player.parent) player.destroy();
			for (var i = 0; i < enemies.length; i++) if (enemies[i].parent) enemies[i].destroy();
			for (var i = 0; i < coins.length; i++) if (coins[i].parent) coins[i].destroy();
			enemies = [];
			coins = [];
			game.addChild(startMenuOverlay);
			// Do NOT pause game logic in adventure mode
		};
	} else {
		if (typeof finishLine !== "undefined" && finishLine.parent) finishLine.destroy();
		finishLine = undefined;
		if (typeof adventureExitBtn !== "undefined" && adventureExitBtn.parent) adventureExitBtn.destroy();
		if (typeof adventureMenuBtn !== "undefined" && adventureMenuBtn.parent) adventureMenuBtn.destroy();
	}
}
// Defensive: ensure lanePositions is always defined before game.update runs
if (typeof lanePositions === "undefined") {
	lanePositions = [roadX + laneWidth * 0.5, roadX + laneWidth * 1.5, roadX + laneWidth * 2.5];
}
// --- Patch PlayerCar to allow dynamic car asset ---
PlayerCar.prototype.setCarAsset = function (assetId) {
	// Remove old asset
	while (this.children.length) this.removeChild(this.children[0]);
	var car = this.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	this.width = car.width;
	this.height = car.height;
};
// --- Start with menu, not game ---
var player, score, distance, coinsCollected, scoreTxt, scoreUpdateTimer, lanePositions;
// Touch controls
// Use square placeholder assets for left/right buttons (replace 'leftBtnSquare' and 'rightBtnSquare' with your asset ids when available)
var leftBtn = LK.getAsset('leftBtnSquare', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 200,
	y: -250
});
LK.gui.bottomLeft.addChild(leftBtn);
var rightBtn = LK.getAsset('rightBtnSquare', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: -200,
	y: -250
});
LK.gui.bottomRight.addChild(rightBtn);
// Control handlers
leftBtn.down = function () {
	if (typeof player !== "undefined" && player && typeof player.lane !== "undefined" && player.lane > 0) {
		player.lane--;
		tween(player, {
			x: lanePositions[player.lane]
		}, {
			duration: 120,
			easing: tween.cubicOut
		});
	}
};
rightBtn.down = function () {
	if (typeof player !== "undefined" && player && typeof player.lane !== "undefined" && player.lane < laneCount - 1) {
		player.lane++;
		tween(player, {
			x: lanePositions[player.lane]
		}, {
			duration: 120,
			easing: tween.cubicOut
		});
	}
};
// Touch drag to move car left/right
var dragStartX = null;
var dragStartLane = null;
game.down = function (x, y, obj) {
	if (x > roadX && x < roadX + roadWidth && y > 2732 - 700) {
		dragStartX = x;
		dragStartLane = player.lane;
	}
};
game.move = function (x, y, obj) {
	if (dragStartX !== null) {
		var dx = x - dragStartX;
		if (Math.abs(dx) > laneWidth * 0.7) {
			if (dx < 0 && player.lane > 0) {
				player.lane--;
				tween(player, {
					x: lanePositions[player.lane]
				}, {
					duration: 120,
					easing: tween.cubicOut
				});
				dragStartX = x;
				dragStartLane = player.lane;
			} else if (dx > 0 && player.lane < laneCount - 1) {
				player.lane++;
				tween(player, {
					x: lanePositions[player.lane]
				}, {
					duration: 120,
					easing: tween.cubicOut
				});
				dragStartX = x;
				dragStartLane = player.lane;
			}
		}
	}
};
game.up = function (x, y, obj) {
	dragStartX = null;
	dragStartLane = null;
};
// Game objects
var enemies = [];
var coins = [];
// Spawning timers
var enemySpawnTick = 0;
var coinSpawnTick = 0;
// Main game update
game.update = function () {
	// Pause all game logic if car selection overlay is visible
	if (carSelectOverlay.parent) {
		return;
	}
	// Adventure mode finish line logic
	var inAdventure = !!game.currentSection;
	if (inAdventure && typeof finishLine !== "undefined" && finishLine) {
		// Move finish line down as the world scrolls
		finishLine.y += 20; // match enemy/car speed
		// Check for crossing finish line
		if (!finishLine.crossed && player.y <= finishLine.y + finishLine.height / 2 && player.y >= finishLine.y - finishLine.height / 2) {
			finishLine.crossed = true;
			// Section complete!
			// Award 20 points if score >= 1000 (no crash)
			var sectionScore = Math.floor(distance / 5) + coinsCollected * 10;
			var earned = sectionScore >= 1000 ? 20 : 0;
			// Unlock next section if not already unlocked
			var unlockedSections = storage.unlockedSections || 1;
			if (game.currentSection >= unlockedSections && game.currentSection < sectionCount) {
				unlockedSections = game.currentSection + 1;
				storage.unlockedSections = unlockedSections;
			}
			// Remove Exit button if present
			if (typeof adventureExitBtn !== "undefined" && adventureExitBtn.parent) adventureExitBtn.destroy();
			// Show overlay: Section Complete!
			var overlay = new Container();
			var msg = new Text2('Section ' + game.currentSection + ' Complete!', {
				size: 120,
				fill: 0xFFD600
			});
			msg.anchor.set(0.5, 0.5);
			msg.x = 2048 / 2;
			msg.y = 900;
			overlay.addChild(msg);
			var earnedTxt = new Text2('Score: ' + sectionScore + (earned ? ' (+20)' : ''), {
				size: 80,
				fill: "#fff"
			});
			earnedTxt.anchor.set(0.5, 0.5);
			earnedTxt.x = 2048 / 2;
			earnedTxt.y = 1100;
			overlay.addChild(earnedTxt);
			var nextBtn = new Text2(game.currentSection < sectionCount ? 'Next Section' : 'Back to Menu', {
				size: 90,
				fill: "#fff"
			});
			nextBtn.anchor.set(0.5, 0.5);
			nextBtn.x = 2048 / 2;
			nextBtn.y = 1300;
			overlay.addChild(nextBtn);
			game.addChild(overlay);
			nextBtn.down = function () {
				overlay.destroy();
				if (game.currentSection < sectionCount) {
					startAdventureSection(game.currentSection + 1);
				} else {
					// Back to menu
					if (typeof sectionLabelTxt !== "undefined" && sectionLabelTxt.parent) sectionLabelTxt.destroy();
					game.addChild(startMenuOverlay);
				}
			};
			// No pause in adventure mode!
			return;
		}
		// Distance
		distance += 0.7;
		// Update UI
		score = Math.floor(distance / 5) + coinsCollected * 10;
		// --- Adventure mode: enemy and coin spawning ---
		// Difficulty scaling: lower spawn interval as section increases
		var difficulty = typeof game.adventureDifficulty !== "undefined" ? game.adventureDifficulty : 1;
		enemySpawnTick++;
		if (enemySpawnTick > (38 + Math.random() * 18) / difficulty) {
			enemySpawnTick = 0;
			var enemyType = Math.floor(Math.random() * 3);
			var enemy;
			if (enemyType === 0) {
				enemy = new EnemyCar();
			} else if (enemyType === 1) {
				enemy = new EnemyCar2();
			} else {
				enemy = new EnemyCar3();
			}
			// Increase enemy speed for higher sections
			enemy.speed *= difficulty;
			enemy.lane = Math.floor(Math.random() * laneCount);
			enemy.x = lanePositions[enemy.lane];
			enemy.y = -200;
			enemies.push(enemy);
			game.addChild(enemy);
		}
		// Spawn coins
		coinSpawnTick++;
		if (coinSpawnTick > (80 + Math.random() * 60) / (0.8 + difficulty * 0.3)) {
			// Coins spawn a bit less frequently as difficulty increases
			coinSpawnTick = 0;
			var coin = new Coin();
			coin.lane = Math.floor(Math.random() * laneCount);
			coin.x = lanePositions[coin.lane];
			coin.y = -120;
			coins.push(coin);
			game.addChild(coin);
		}
		// Update enemies
		for (var i = enemies.length - 1; i >= 0; i--) {
			var e = enemies[i];
			e.update();
			if (e.y > 2732 + 200) {
				e.destroy();
				enemies.splice(i, 1);
				continue;
			}
			if (e.intersects(player)) {
				LK.effects.flashObject(player, 0xff0000, 600);
				LK.effects.flashScreen(0xff0000, 800);
				// Remove Exit button if present
				if (typeof adventureExitBtn !== "undefined" && adventureExitBtn.parent) adventureExitBtn.destroy();
				// Remove player car from the scene so it does not continue after crash
				if (typeof player !== "undefined" && player && player.parent) player.destroy();
				// Show fail overlay
				var overlay = new Container();
				var failTxt = new Text2('Crashed!', {
					size: 150,
					fill: 0xFF0000
				});
				failTxt.anchor.set(0.5, 0.5);
				failTxt.x = 2048 / 2;
				failTxt.y = 900;
				overlay.addChild(failTxt);
				// Show score above retry button
				var sectionScore = Math.floor(distance / 5) + coinsCollected * 10;
				var scoreAboveRetry = new Text2('Score: ' + sectionScore, {
					size: 80,
					fill: "#fff"
				});
				scoreAboveRetry.anchor.set(0.5, 0.5);
				scoreAboveRetry.x = 2048 / 2;
				scoreAboveRetry.y = 1100;
				overlay.addChild(scoreAboveRetry);
				var retryBtn = new Text2('Retry Section', {
					size: 100,
					fill: "#fff"
				});
				retryBtn.anchor.set(0.5, 0.5);
				retryBtn.x = 2048 / 2;
				retryBtn.y = 1200;
				overlay.addChild(retryBtn);
				game.addChild(overlay);
				retryBtn.down = function () {
					overlay.destroy();
					startAdventureSection(game.currentSection);
					// Enemies and coins will come immediately after retry
					enemySpawnTick = 1000; // force spawn on next update
					coinSpawnTick = 1000;
				};
				// No pause in adventure mode!
				return;
			}
		}
		// Update coins
		for (var i = coins.length - 1; i >= 0; i--) {
			var c = coins[i];
			c.update();
			if (c.y > 2732 + 120) {
				c.destroy();
				coins.splice(i, 1);
				continue;
			}
			if (c.intersects(player)) {
				coinsCollected++;
				score = Math.floor(distance / 5) + coinsCollected * 10;
				scoreTxt.setText('Score: ' + score);
				LK.effects.flashObject(player, 0xFFD600, 300);
				c.destroy();
				coins.splice(i, 1);
				continue;
			}
		}
		return;
	}
	// Distance
	distance += 0.7;
	// Update UI
	score = Math.floor(distance / 5) + coinsCollected * 10;
	// Adventure mode: lockout on crash
	if (inAdventure) {
		// If player collides with enemy, show fail overlay and do not unlock section
		for (var i = enemies.length - 1; i >= 0; i--) {
			var e = enemies[i];
			e.update();
			if (e.y > 2732 + 200) {
				e.destroy();
				enemies.splice(i, 1);
				continue;
			}
			if (e.intersects(player)) {
				LK.effects.flashObject(player, 0xff0000, 600);
				LK.effects.flashScreen(0xff0000, 800);
				// Remove Exit button if present
				if (typeof adventureExitBtn !== "undefined" && adventureExitBtn.parent) adventureExitBtn.destroy();
				// Show fail overlay
				var overlay = new Container();
				var failTxt = new Text2('Crashed!', {
					size: 150,
					fill: 0xFF0000
				});
				failTxt.anchor.set(0.5, 0.5);
				failTxt.x = 2048 / 2;
				failTxt.y = 900;
				overlay.addChild(failTxt);
				// Show score above retry button
				var sectionScore = Math.floor(distance / 5) + coinsCollected * 10;
				var scoreAboveRetry = new Text2('Score: ' + sectionScore, {
					size: 80,
					fill: "#fff"
				});
				scoreAboveRetry.anchor.set(0.5, 0.5);
				scoreAboveRetry.x = 2048 / 2;
				scoreAboveRetry.y = 1100;
				overlay.addChild(scoreAboveRetry);
				var retryBtn = new Text2('Retry Section', {
					size: 100,
					fill: "#fff"
				});
				retryBtn.anchor.set(0.5, 0.5);
				retryBtn.x = 2048 / 2;
				retryBtn.y = 1200;
				overlay.addChild(retryBtn);
				game.addChild(overlay);
				retryBtn.down = function () {
					overlay.destroy();
					startAdventureSection(game.currentSection);
					// Enemies and coins will come immediately after retry
					enemySpawnTick = 1000;
					coinSpawnTick = 1000;
				};
				// No pause in adventure mode!
				return;
			}
		}
	} else {
		// Normal mode: original logic
		if (score >= 999) {
			// Stop the score update timer
			if (typeof scoreUpdateTimer !== "undefined") LK.clearInterval(scoreUpdateTimer);
			// Show Congratulations overlay
			var congratsTxt = new Text2('Congratulations', {
				size: 180,
				fill: 0xFFD600
			});
			congratsTxt.anchor.set(0.5, 0.5);
			congratsTxt.x = 2048 / 2;
			congratsTxt.y = 900;
			var playAgainBtn = new Text2('Play Again', {
				size: 120,
				fill: "#fff"
			});
			playAgainBtn.anchor.set(0.5, 0.5);
			playAgainBtn.x = 2048 / 2;
			playAgainBtn.y = 1200;
			// Overlay container
			var overlay = new Container();
			overlay.addChild(congratsTxt);
			overlay.addChild(playAgainBtn);
			game.addChild(overlay);
			playAgainBtn.down = function () {
				// Remove overlay and restart game
				overlay.destroy();
				LK.showGameOver(); // Triggers game reset
			};
			// Pause game logic
			game.update = function () {};
			return;
		}
		// Spawn enemy cars
		enemySpawnTick++;
		if (enemySpawnTick > 38 + Math.random() * 18) {
			enemySpawnTick = 0;
			var enemyType = Math.floor(Math.random() * 3);
			var enemy;
			if (enemyType === 0) {
				enemy = new EnemyCar();
			} else if (enemyType === 1) {
				enemy = new EnemyCar2();
			} else {
				enemy = new EnemyCar3();
			}
			enemy.lane = Math.floor(Math.random() * laneCount);
			enemy.x = lanePositions[enemy.lane];
			enemy.y = -200;
			enemies.push(enemy);
			game.addChild(enemy);
		}
		// Spawn coins
		coinSpawnTick++;
		if (coinSpawnTick > 80 + Math.random() * 60) {
			coinSpawnTick = 0;
			var coin = new Coin();
			coin.lane = Math.floor(Math.random() * laneCount);
			coin.x = lanePositions[coin.lane];
			coin.y = -120;
			coins.push(coin);
			game.addChild(coin);
		}
		// Update enemies
		for (var i = enemies.length - 1; i >= 0; i--) {
			var e = enemies[i];
			e.update();
			if (e.y > 2732 + 200) {
				e.destroy();
				enemies.splice(i, 1);
				continue;
			}
			// Collision with player
			if (e.intersects(player)) {
				// Turbo Car 2 (enemyCar) hit! Player must dodge it.
				LK.effects.flashObject(player, 0xff0000, 600);
				LK.effects.flashScreen(0xff0000, 800);
				startGame(); // Restart the game automatically
				return;
			}
		}
	}
	// Update coins
	for (var i = coins.length - 1; i >= 0; i--) {
		var c = coins[i];
		c.update();
		if (c.y > 2732 + 120) {
			c.destroy();
			coins.splice(i, 1);
			continue;
		}
		if (c.intersects(player)) {
			coinsCollected++;
			score = Math.floor(distance / 5) + coinsCollected * 10;
			scoreTxt.setText('Score: ' + score);
			LK.effects.flashObject(player, 0xFFD600, 300);
			c.destroy();
			coins.splice(i, 1);
			continue;
		}
	}
};
// Center UI elements
// scoreTxt is always at top right, do not move it to center
// Prevent UI from overlapping top left menu
// (already handled by not placing anything at gui.topLeft or at x < 100, y < 100)