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

/**** 
* Classes
****/ 
// Cloud class: background only, moves with camera, not collidable
var Cloud = Container.expand(function () {
	var self = Container.call(this);
	// Pick a random cloud asset
	var cloudAssets = ['cloudBlue', 'cloudBright', 'cloudFluffy', 'cloudGray', 'cloudSoft'];
	var assetId = cloudAssets[Math.floor(Math.random() * cloudAssets.length)];
	var assetInfo = LK.getAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Scale clouds to a reasonable size for background
	var targetHeight = 180 + Math.random() * 80; // 180-260px
	var scale = targetHeight / assetInfo.height;
	var cloudGfx = self.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: scale,
		scaleY: scale,
		alpha: 0.45 + Math.random() * 0.15 // more transparent clouds
	});
	// Set initial position (x, y) and speed
	self.x = Math.random() * 2048;
	self.y = Math.random() * 2048;
	self.speedY = 0; // Will be set by camera movement
	// Give some clouds a gentle horizontal drift
	self.driftX = (Math.random() < 0.5 ? -1 : 1) * (0.2 + Math.random() * 0.5);
	// Clouds are always behind everything
	self.setToBack = function () {
		if (self.parent && self.parent.children.indexOf(self) > 0) {
			self.parent.setChildIndex(self, 0);
		}
	};
	// No collision, no input
	self.update = function () {
		// Track lastX for border collision detection
		if (typeof self.lastX === "undefined") self.lastX = self.x;
		// Horizontal drift
		self.x += self.driftX;
		// Prevent clouds from reaching within 1/30 of the screen X from any edge
		var minCloudX = BORDER_LEFT_X;
		var maxCloudX = BORDER_RIGHT_X;
		// Bounce off left transparent border (minCloudX)
		if (self.lastX > minCloudX && self.x <= minCloudX) {
			self.x = minCloudX;
			self.driftX = Math.abs(self.driftX); // move right
		}
		// If cloud is ever inside the left transparent border, force it back and reverse
		if (self.x < minCloudX) {
			self.x = minCloudX;
			self.driftX = Math.abs(self.driftX); // move right
		}
		// Bounce off right transparent border (maxCloudX)
		if (self.lastX < maxCloudX && self.x >= maxCloudX) {
			self.x = maxCloudX;
			self.driftX = -Math.abs(self.driftX); // move left
		}
		// If cloud is ever inside the right transparent border, force it back and reverse
		if (self.x > maxCloudX) {
			self.x = maxCloudX;
			self.driftX = -Math.abs(self.driftX); // move left
		}
		// Remove wrap horizontally (clouds never go past borders)
		// Update lastX for next frame
		self.lastX = self.x;
		// Vertical movement is handled by camera diff in game.update
	};
	return self;
});
// --- Coin class: collectible, always same visual size, shows value popup ---
var Coin = Container.expand(function () {
	var self = Container.call(this);
	// Coin type: 1, 2, or 3 (for +1, +3, +5)
	self.coinType = 1;
	self.value = 1;
	self.assetId = 'chipCoin1';
	// Set asset and value based on type
	if (typeof arguments[0] === "number") {
		if (arguments[0] === 1) {
			self.coinType = 1;
			self.value = 1;
			self.assetId = 'chipCoin1';
		} else if (arguments[0] === 2) {
			self.coinType = 2;
			self.value = 3;
			self.assetId = 'chipCoin2';
		} else if (arguments[0] === 3) {
			self.coinType = 3;
			self.value = 5;
			self.assetId = 'chipCoin3';
		}
	}
	// Always render coins at the same visual size (height 80px)
	var targetHeight = 80;
	var assetInfo = LK.getAsset(self.assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var scale = targetHeight / assetInfo.height;
	var coinGfx = self.attachAsset(self.assetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: scale,
		scaleY: scale
	});
	// For collision
	self.radius = assetInfo.width * scale / 2;
	// Show value popup when collected
	self.showValuePopup = function () {
		var txt = new Text2('+' + self.value, {
			size: 60,
			fill: self.value === 1 ? "#ffe066" : self.value === 3 ? "#a78bfa" : "#38bdf8",
			font: "Impact"
		});
		txt.anchor.set(0.5, 0.5);
		txt.x = self.x;
		txt.y = self.y - 40;
		game.addChild(txt);
		// Ensure popup is above player
		if (txt.parent && player && txt.parent.children.indexOf(txt) < txt.parent.children.indexOf(player)) {
			txt.parent.setChildIndex(txt, txt.parent.children.length - 1);
		}
		tween(txt, {
			y: txt.y - 80,
			alpha: 0
		}, {
			duration: 700,
			onFinish: function onFinish() {
				txt.destroy();
			}
		});
	};
	return self;
});
// --- PlatformSign class: shows a sign with platforms passed on the last platform of each theme ---
var PlatformSign = Container.expand(function () {
	var self = Container.call(this);
	// Use a simple box as the sign background
	var signW = 220,
		signH = 110;
	var signBg = self.attachAsset('chipPlatform0', {
		anchorX: 0.5,
		anchorY: 1,
		scaleX: signW / 820,
		scaleY: signH / 110,
		color: 0x22223b
	});
	// Text label for platforms passed
	var signTxt = new Text2('0', {
		size: 60,
		fill: "#fff",
		font: "Impact"
	});
	signTxt.anchor.set(0.5, 0.5);
	signTxt.x = 0;
	signTxt.y = -signH / 2;
	self.addChild(signTxt);
	// Set the value to display
	self.setPlatformsPassed = function (val) {
		signTxt.setText(val + "");
	};
	return self;
});
// PokerChip class: simple collectible poker chip (not draggable, not rotatable)
var PokerChip = Container.expand(function () {
	var self = Container.call(this);
	// Asset id and color are passed in, default to 'chipCoin1'
	self.assetId = self.assetId || 'chipCoin1';
	var chipAssetInfo = LK.getAsset(self.assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Always render poker chips at a consistent visual size (height 80px)
	var targetHeight = 80;
	var scale = targetHeight / chipAssetInfo.height;
	var chip = self.attachAsset(self.assetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: scale,
		scaleY: scale
	});
	// For hit testing
	self.radius = chipAssetInfo.width * scale / 2;
	// Show value popup when collected (optional, can be customized)
	self.value = 1;
	self.showValuePopup = function () {
		var txt = new Text2('+1', {
			size: 60,
			fill: 0xFFE066,
			font: "Impact"
		});
		txt.anchor.set(0.5, 0.5);
		txt.x = self.x;
		txt.y = self.y - 40;
		game.addChild(txt);
		tween(txt, {
			y: txt.y - 80,
			alpha: 0
		}, {
			duration: 700,
			onFinish: function onFinish() {
				txt.destroy();
			}
		});
	};
	return self;
});
// --- Star class: collectible, animated, optimized for performance ---
var Star = Container.expand(function () {
	var self = Container.call(this);
	// Use the new collectibleStar asset
	self.assetId = 'collectibleStar';
	self.value = 10; // Stars are worth +10
	var assetInfo = LK.getAsset(self.assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Always render stars at the same visual size (height 70px)
	var targetHeight = 70;
	var scale = targetHeight / assetInfo.height;
	var starGfx = self.attachAsset(self.assetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: scale,
		scaleY: scale,
		alpha: 0.92
	});
	// For collision
	self.radius = assetInfo.width * scale / 2;
	// Animate star: slow rotation and pulsing
	self.update = function () {
		if (starGfx) {
			starGfx.rotation += 0.09;
			var pulse = 0.95 + 0.08 * Math.sin(Date.now() / 180 + self.x);
			starGfx.scale.x = scale * pulse;
			starGfx.scale.y = scale * pulse;
		}
	};
	// Show value popup when collected
	self.showValuePopup = function () {
		var txt = new Text2('+10', {
			size: 60,
			fill: 0xFFF7B2,
			font: "Impact"
		});
		txt.anchor.set(0.5, 0.5);
		txt.x = self.x;
		txt.y = self.y - 40;
		game.addChild(txt);
		if (txt.parent && player && txt.parent.children.indexOf(txt) < txt.parent.children.indexOf(player)) {
			txt.parent.setChildIndex(txt, txt.parent.children.length - 1);
		}
		tween(txt, {
			y: txt.y - 80,
			alpha: 0
		}, {
			duration: 700,
			onFinish: function onFinish() {
				txt.destroy();
			}
		});
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x18181b
});

/**** 
* Game Code
****/ 
// Collectible star asset (yellow star shape)
// Cloud shape assets for customizable cloud looks
// --- Icy Tower Constants ---
// Additional chip assets for more levels
// was chipBlack
// was chipBrown
// was chipCyan
// was chipPink
// was chipPurple
// was chipYellow
// was chipGreen
// was chipOrange
// was chipWhite
// Grass
// Forest
// Mud
// Magic
// Candy
// Night
// Stone
// Ice
// Metal
// Neon
// Gold
// gold coin, value 1
// purple coin, value 3
// (Cloud update and spawn logic removed)
var highScore = storage.highScore || 0;
var GAME_W = 2048;
var GAME_H = 2732;
var PLATFORM_W = 400;
// Define new left/right border X values at the intersection of opaque and transparent background
var BORDER_LEFT_X = Math.floor(GAME_W / 30);
var BORDER_RIGHT_X = GAME_W - Math.floor(GAME_W / 30);
var PLATFORM_H = 110;
var PLATFORM_SPACING_MIN = 320;
var PLATFORM_SPACING_MAX = 440;
var PLAYER_W = 120;
var PLAYER_H = 120;
var GRAVITY = 2.2;
var JUMP_VELOCITY = -48;
var MOVE_SPEED = 22;
var PLATFORM_X_MARGIN = 120;
var CAMERA_OFFSET = 900; // How far from bottom the player is kept
// --- Cloud background state ---
var clouds = [];
var NUM_CLOUDS = 8; // Number of clouds to show in background
// --- State ---
var platforms = [];
var coins = []; // All active coins
var stars = []; // All active stars
var player = null;
var vy = 0;
var vx = 0;
var isJumping = false;
var isTouching = false;
var touchStartX = 0;
// Track all active touches (for multi-touch)
var activeTouches = [];
var cameraY = 0;
var maxHeight = 0;
var gameOver = false;
game.hasDoubleJumped = false;
// --- Assets ---
var playerAsset = LK.getAsset('chipCharacter', {
	anchorX: 0.5,
	anchorY: 1,
	scaleX: PLAYER_W / 320,
	scaleY: PLAYER_H / 320
});
// Level themes: background color and platform asset per level
// Platform color is always high-contrast with background for visibility
var LEVEL_THEMES = [{
	// 1 Grass
	bg: 0x18181b,
	platformAsset: 'chipPlatform1',
	platformColor: 0xfacc15
}, {
	// 2 Forest
	bg: 0x1e293b,
	platformAsset: 'chipPlatform2',
	platformColor: 0xf1f5f9
}, {
	// 3 Mud
	bg: 0x3b1e1e,
	platformAsset: 'chipPlatform3',
	platformColor: 0xffffff
}, {
	// 4 Magic
	bg: 0x2d1e3b,
	platformAsset: 'chipPlatform4',
	platformColor: 0xffe066
}, {
	// 5 Candy
	bg: 0x3b2d1e,
	platformAsset: 'chipPlatform5',
	platformColor: 0x22223b
}, {
	// 6 Night
	bg: 0x1e3b2d,
	platformAsset: 'chipPlatform6',
	platformColor: 0xf8fafc
}, {
	// 7 Stone
	bg: 0x3b1e2d,
	platformAsset: 'chipPlatform7',
	platformColor: 0x22223b
}, {
	// 8 Ice
	bg: 0x1e2d3b,
	platformAsset: 'chipPlatform8',
	platformColor: 0x22223b
}, {
	// 9 Metal
	bg: 0x2d3b1e,
	platformAsset: 'chipPlatform9',
	platformColor: 0xf8fafc
}, {
	// 10 Neon
	bg: 0x000000,
	platformAsset: 'chipPlatform10',
	platformColor: 0xfacc15
}, {
	// 11 Special (chipPlatform11)
	bg: 0x22223b,
	platformAsset: 'chipPlatform11',
	platformColor: 0xffffff
}];
// Helper to get current theme index based on platformsPassed/level
function getThemeIndex(score) {
	// Every level lasts for 40 platforms
	var idx = Math.floor(platformsPassed / 40);
	if (idx < 0) idx = 0;
	if (idx >= LEVEL_THEMES.length) idx = LEVEL_THEMES.length - 1;
	return idx;
}
// Helper to get current theme object
function getCurrentTheme(score) {
	return LEVEL_THEMES[getThemeIndex(score)];
}
// Used for initial platform asset (will be replaced in createPlatform)
var platformAsset = LK.getAsset('chipPlatform8', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: PLATFORM_W / 1100,
	scaleY: PLATFORM_H / 700
});
// --- UI ---
// Platform pass counter
var platformsPassed = 0;
// Track total coins collected
var coinsCollected = 0;
// --- Score & Coins UI ---
// Create a container for the UI background and labels
var uiContainer = new Container();
// Add a black rectangle background behind the UI (covers full top width, rectangle shape)
var uiBgRect = LK.getAsset('uiTopBgRect', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0,
	scaleX: GAME_W / 100,
	scaleY: 1
});
uiContainer.addChild(uiBgRect);
var uiBgWidth = GAME_W;
var uiBgHeight = 110;
// "Coins: <number>" label (first, left)
var coinsLabelTxt = new Text2('Coins: 0', {
	size: 70,
	fill: 0xFFE066,
	font: "Impact"
});
coinsLabelTxt.anchor.set(0, 0.5); // left aligned, vertically centered
coinsLabelTxt.x = 60;
coinsLabelTxt.y = uiBgHeight / 2;
// "Score:" label (right of coins, with extra spacing)
var scoreLabelTxt = new Text2('Score:', {
	size: 70,
	fill: "#fff",
	font: "Impact"
});
scoreLabelTxt.anchor.set(0, 0.5); // left aligned, vertically centered
scoreLabelTxt.x = coinsLabelTxt.x + coinsLabelTxt.width + 80;
scoreLabelTxt.y = uiBgHeight / 2;
// Score value (right of label, with spacing)
var scoreTxt = new Text2('0', {
	size: 80,
	fill: "#fff",
	font: "Impact"
});
scoreTxt.anchor.set(0, 0.5); // left aligned, vertically centered
scoreTxt.x = scoreLabelTxt.x + scoreLabelTxt.width + 30;
scoreTxt.y = uiBgHeight / 2;
// Add all to container in new order: coins, score label, score value
uiContainer.addChild(coinsLabelTxt);
uiContainer.addChild(scoreLabelTxt);
uiContainer.addChild(scoreTxt);
// Center the UI container at the top of the screen
uiContainer.x = 0;
uiContainer.y = 0;
// Add to GUI overlay (top center)
LK.gui.top.addChild(uiContainer);
// Proper high score text object for updating best score
var highScoreTxt = new Text2('', {
	size: 60,
	fill: "#fff",
	font: "Impact"
});
highScoreTxt.anchor.set(1, 0.5); // right aligned, vertically centered
highScoreTxt.x = GAME_W - 60;
highScoreTxt.y = uiBgHeight / 2;
uiContainer.addChild(highScoreTxt);
// Listen for game over and update final score in the popup
LK.on('gameover', function () {
	// Show the correct final score in the game over popup
	if (typeof LK.setFinalScore === "function") {
		LK.setFinalScore(platformsPassed);
	}
});
// --- Helper: create a platform at (x, y) ---
function createPlatform(x, y, width) {
	var plat = new Container();
	// Make each new platform a bit harder as level increases
	// Find the last platform's width if any, otherwise use PLATFORM_W
	var lastPlat = platforms.length > 0 ? platforms[platforms.length - 1] : null;
	var prevW = lastPlat && lastPlat.width ? lastPlat.width : PLATFORM_W;
	var level = getThemeIndex(platformsPassed);
	// Platform width shrinks with level, min 220, max 1100
	// Make width decrease more gradually per level (every 20 platforms)
	var baseW = 820 - level * 40;
	if (baseW < 220) baseW = 220;
	var w;
	// Platform width logic (no checkpoint logic)
	var platNum = platformsPassed + platforms.length;
	var themeLength = 50;
	var w;
	if (typeof width === "number") {
		w = width;
	} else {
		// Each new platform is 4% wider than the previous, but capped by baseW for the level
		w = Math.min(prevW * 1.04, baseW);
	}
	// Determine theme based on platformsPassed for new platforms
	var theme = getCurrentTheme(platformsPassed);
	var assetId = theme.platformAsset;
	var platformColor = theme.platformColor;
	// Get original asset size for aspect ratio
	var assetInfo = LK.getAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var origW = assetInfo.width;
	var origH = assetInfo.height;
	var scaleX = w / origW;
	var scaleY = PLATFORM_H / origH;
	// To preserve aspect ratio, use the smaller scale
	var scale = Math.min(scaleX, scaleY);
	var platGfx = plat.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: scale,
		scaleY: scale,
		color: platformColor
	});
	plat.x = x;
	plat.y = y;
	plat.width = w;
	plat.height = PLATFORM_H;
	plat.PLATFORM_H = PLATFORM_H;
	game.addChild(plat);
	platforms.push(plat);
	// --- Coin and Star placement logic ---
	// Don't place coins or stars on the first platform (player start)
	// Also, do not spawn collectibles in the first theme (first 40 platforms)
	if (platforms.length > 1 && getThemeIndex(platformsPassed) > 0) {
		// 50% chance to spawn a coin on this platform
		if (Math.random() < 0.5) {
			// Randomly pick coin type: 60% +1, 30% +3, 10% +5
			var r = Math.random();
			var coinType = 1;
			if (r > 0.9) coinType = 3;else if (r > 0.6) coinType = 2;
			// Place coin at center of platform, slightly above
			var coin = new Coin(coinType);
			coin.x = plat.x;
			coin.y = plat.y - PLATFORM_H / 2 - 40;
			game.addChild(coin);
			coins.push(coin);
		}
		// 15% chance to spawn a star (but not if a coin is already placed)
		if (Math.random() < 0.15 && coins.length > 0 && coins[coins.length - 1].x !== plat.x) {
			var star = new Star();
			star.x = plat.x + (Math.random() - 0.5) * (plat.width * 0.4); // randomize a bit
			star.y = plat.y - PLATFORM_H / 2 - 100;
			game.addChild(star);
			stars.push(star);
		}
	}
	// --- Add a sign to the last platform of each theme ---
	var themeIdxForPlat = getThemeIndex(platformsPassed + platforms.length - 1);
	var isLastOfTheme = (platformsPassed + platforms.length) % 40 === 0;
	if (isLastOfTheme) {
		var sign = new PlatformSign();
		sign.x = plat.x;
		sign.y = plat.y - PLATFORM_H / 2 - 10;
		sign.setPlatformsPassed(platformsPassed + platforms.length);
		game.addChild(sign);
		plat._themeSign = sign;
	}
	return plat;
}
// --- Helper: find a safe X for a new platform, given previous platform ---
function getSafePlatformX(prevPlat, width) {
	// Always keep new platform horizontally reachable from previous
	var minX = Math.max(PLATFORM_X_MARGIN + width / 2, prevPlat ? prevPlat.x - 400 : PLATFORM_X_MARGIN + width / 2);
	var maxX = Math.min(GAME_W - PLATFORM_X_MARGIN - width / 2, prevPlat ? prevPlat.x + 400 : GAME_W - PLATFORM_X_MARGIN - width / 2);
	if (minX > maxX) minX = maxX = prevPlat ? prevPlat.x : GAME_W / 2;
	return minX + Math.random() * (maxX - minX);
}
// --- Helper: reset game state ---
function resetGame() {
	// Remove old coins
	for (var i = coins.length - 1; i >= 0; --i) {
		if (coins[i] && typeof coins[i].destroy === "function") {
			coins[i].destroy();
		}
	}
	coins = [];
	// Remove old stars
	for (var i = stars.length - 1; i >= 0; --i) {
		if (stars[i] && typeof stars[i].destroy === "function") {
			stars[i].destroy();
		}
	}
	stars = [];
	// Remove old platforms
	for (var i = 0; i < platforms.length; ++i) {
		platforms[i].destroy();
	}
	platforms = [];
	// Remove player
	if (player) player.destroy();
	// Create player
	player = new Container();
	var pGfx = player.attachAsset('chipCharacter', {
		anchorX: 0.5,
		anchorY: 1,
		scaleX: PLAYER_W / 320,
		scaleY: PLAYER_H / 320
	});
	player.x = GAME_W / 2;
	player.y = GAME_H - 400;
	player.width = PLAYER_W;
	player.height = PLAYER_H;
	game.addChild(player);
	vy = 0;
	vx = 0;
	isJumping = false;
	isTouching = false;
	cameraY = 0;
	maxHeight = 0;
	gameOver = false;
	// Create initial platforms
	var y = GAME_H - 120;
	// --- Add platform0 as the very first platform ---
	var platform0AssetId = 'chipPlatform0';
	var platform0AssetInfo = LK.getAsset(platform0AssetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var platform0W = platform0AssetInfo.width;
	var platform0H = platform0AssetInfo.height;
	var platform0Scale = PLATFORM_H / platform0H;
	var platform0 = new Container();
	var platform0Gfx = platform0.attachAsset(platform0AssetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: platform0Scale,
		scaleY: platform0Scale
	});
	platform0.x = GAME_W / 2;
	platform0.y = y;
	platform0.width = platform0W * platform0Scale;
	platform0.height = PLATFORM_H;
	platform0.PLATFORM_H = PLATFORM_H;
	game.addChild(platform0);
	platforms.push(platform0);
	// Place player directly above platform0, so the game starts after landing on this platform
	player.x = platform0.x;
	player.y = platform0.y - PLATFORM_H / 2 - PLAYER_H / 2 + 10; // Center player above platform, slightly above
	// Now create the rest of the platforms as before
	var level = getThemeIndex(platformsPassed);
	var EASY_PLATFORM_W = 820 - level * 40;
	if (EASY_PLATFORM_W < 220) EASY_PLATFORM_W = 220;
	// Keep vertical spacing constant for all levels
	var EASY_PLATFORM_SPACING = 240;
	var prevPlat = platform0;
	y -= EASY_PLATFORM_SPACING;
	for (var i = 1; i < 12; ++i) {
		var px = getSafePlatformX(prevPlat, EASY_PLATFORM_W);
		var plat = createPlatform(px, y, EASY_PLATFORM_W);
		prevPlat = plat;
		y -= EASY_PLATFORM_SPACING;
	}
	// Sort platforms by y
	platforms.sort(function (a, b) {
		return a.y - b.y;
	});
	// Score
	platformsPassed = 0;
	coinsCollected = 0;
	highScoreTxt.setText('Best: ' + highScore);
	// Reset theme and background
	game.lastThemeIndex = -1;
	// Use bgTheme asset classes for background
	var themeIdx = getThemeIndex(platformsPassed);
	// Map for each theme: [opaqueAsset, transparentAsset]
	var bgThemeAssets = [['bgThemeGrassOpaque', 'bgThemeGrassTrans'],
	// 0 Grass
	['bgThemeForestOpaque', 'bgThemeForestTrans'],
	// 1 Forest
	['bgThemeMudOpaque', 'bgThemeMudTrans'],
	// 2 Mud
	['bgThemeMagicOpaque', 'bgThemeMagicTrans'],
	// 3 Magic
	['bgThemeCandyOpaque', 'bgThemeCandyTrans'],
	// 4 Candy
	['bgThemeNightOpaque', 'bgThemeNightTrans'],
	// 5 Night
	['bgThemeStoneOpaque', 'bgThemeStoneTrans'],
	// 6 Stone
	['bgThemeIceOpaque', 'bgThemeIceTrans'],
	// 7 Ice
	['bgThemeMetalOpaque', 'bgThemeMetalTrans'],
	// 8 Metal
	['bgThemeNeonOpaque', 'bgThemeNeonTrans'],
	// 9 Neon
	['bgThemeSpecialOpaque', 'bgThemeSpecialTrans'] // 10 Special
	];
	if (themeIdx < 0) themeIdx = 0;
	if (themeIdx >= bgThemeAssets.length) themeIdx = bgThemeAssets.length - 1;
	// Remove previous background asset if any
	if (game._bgThemeAsset) {
		if (typeof game._bgThemeAsset.destroy === "function") {
			game._bgThemeAsset.destroy();
		}
		game._bgThemeAsset = null;
	}
	// Add new background asset as the first child (behind everything)
	var bgOpaqueAssetId = bgThemeAssets[themeIdx][0];
	var bgTransAssetId = bgThemeAssets[themeIdx][1];
	// Create a container for the background with three segments: left, center, right
	var bgThemeContainer = new Container();
	var bgOpaqueAssetInfo = LK.getAsset(bgOpaqueAssetId, {
		anchorX: 0,
		anchorY: 0
	});
	var bgTransAssetInfo = LK.getAsset(bgTransAssetId, {
		anchorX: 0,
		anchorY: 0
	});
	var bgWidth = GAME_W;
	var leftW = Math.floor(bgWidth / 30);
	var rightW = Math.floor(bgWidth / 30);
	var centerW = bgWidth - leftW - rightW;
	// Left 1/30 (opaque)
	var bgLeft = LK.getAsset(bgOpaqueAssetId, {
		anchorX: 0,
		anchorY: 0,
		x: 0,
		y: 0,
		scaleX: leftW / bgOpaqueAssetInfo.width,
		scaleY: GAME_H / bgOpaqueAssetInfo.height,
		alpha: 1
	});
	bgThemeContainer.addChild(bgLeft);
	// Center (transparent)
	var bgCenter = LK.getAsset(bgTransAssetId, {
		anchorX: 0,
		anchorY: 0,
		x: leftW,
		y: 0,
		scaleX: centerW / bgTransAssetInfo.width,
		scaleY: GAME_H / bgTransAssetInfo.height,
		alpha: 0.3
	});
	bgThemeContainer.addChild(bgCenter);
	// Right 1/30 (opaque)
	var bgRight = LK.getAsset(bgOpaqueAssetId, {
		anchorX: 0,
		anchorY: 0,
		x: leftW + centerW,
		y: 0,
		scaleX: rightW / bgOpaqueAssetInfo.width,
		scaleY: GAME_H / bgOpaqueAssetInfo.height,
		alpha: 1
	});
	bgThemeContainer.addChild(bgRight);
	game.addChild(bgThemeContainer);
	if (game.children && game.children.length > 1) {
		game.setChildIndex(bgThemeContainer, 0);
	}
	game._bgThemeAsset = bgThemeContainer;
	// Remove old clouds
	for (var i = clouds.length - 1; i >= 0; --i) {
		if (clouds[i] && typeof clouds[i].destroy === "function") {
			clouds[i].destroy();
		}
	}
	clouds = [];
	// Add new clouds to background
	for (var i = 0; i < NUM_CLOUDS; ++i) {
		var cloud = new Cloud();
		// Distribute vertically in the upper 2/3 of the screen
		cloud.y = Math.random() * (GAME_H * 0.66);
		cloud.x = Math.random() * GAME_W;
		game.addChild(cloud);
		cloud.setToBack && cloud.setToBack();
		clouds.push(cloud);
	}
	// (Cloud background reset removed)
}
// --- Helper: check collision between player and platform ---
function playerOnPlatform() {
	for (var i = 0; i < platforms.length; ++i) {
		var plat = platforms[i];
		// Only check if player is falling
		if (vy >= 0) {
			var px = player.x;
			var py = player.y;
			var platTop = plat.y - (plat.PLATFORM_H ? plat.PLATFORM_H : PLATFORM_H) / 2;
			var platLeft = plat.x - plat.width / 2;
			var platRight = plat.x + plat.width / 2;
			// Use previous player y for more reliable collision
			if (typeof player.lastY === "undefined") player.lastY = py - vy;
			// Check if player's feet crossed the platform top this frame
			if (player.lastY <= platTop && py >= platTop) {
				// Require player to be horizontally within platform bounds (with a small margin)
				if (px > platLeft + 10 && px < platRight - 10) {
					player.lastY = py; // update for next frame
					return plat;
				}
			}
		}
	}
	if (typeof player !== "undefined") player.lastY = player.y;
	return null;
}
// --- Touch controls: left/right jump ---
game.down = function (x, y, obj) {
	if (gameOver) return;
	// Add this touch to activeTouches
	if (obj && obj.event && typeof obj.event.identifier !== "undefined") {
		// Remove if already present (shouldn't happen, but for safety)
		for (var i = 0; i < activeTouches.length; ++i) {
			if (activeTouches[i].id === obj.event.identifier) {
				activeTouches.splice(i, 1);
				break;
			}
		}
		activeTouches.push({
			id: obj.event.identifier,
			x: x,
			y: y
		});
	} else {
		// Fallback for mouse or single touch
		activeTouches = [{
			id: 0,
			x: x,
			y: y
		}];
	}
	isTouching = true;
	touchStartX = x;
	// Always use the last finger down for direction, even after double jump
	var lastTouch = activeTouches[activeTouches.length - 1];
	if (lastTouch && lastTouch.x < GAME_W / 2) {
		vx = -MOVE_SPEED;
	} else {
		vx = MOVE_SPEED;
	}
	// If player is on ground/platform, jump
	if (!isJumping && !game.hasDoubleJumped) {
		vy = JUMP_VELOCITY;
		isJumping = true;
	}
	// No-op: direction change after double jump is handled in move handler
};
game.up = function (x, y, obj) {
	// Remove this touch from activeTouches
	if (obj && obj.event && typeof obj.event.identifier !== "undefined") {
		for (var i = 0; i < activeTouches.length; ++i) {
			if (activeTouches[i].id === obj.event.identifier) {
				activeTouches.splice(i, 1);
				break;
			}
		}
	} else {
		// Fallback for mouse or single touch
		activeTouches = [];
	}
	if (activeTouches.length === 0) {
		isTouching = false;
		vx = 0;
	} else {
		// Use the new last finger for direction, even after double jump
		var lastTouch = activeTouches[activeTouches.length - 1];
		if (lastTouch && lastTouch.x < GAME_W / 2) {
			vx = -MOVE_SPEED;
		} else {
			vx = MOVE_SPEED;
		}
	}
};
game.move = function (x, y, obj) {
	// Update the position of the moving finger in activeTouches
	if (obj && obj.event && typeof obj.event.identifier !== "undefined") {
		for (var i = 0; i < activeTouches.length; ++i) {
			if (activeTouches[i].id === obj.event.identifier) {
				activeTouches[i].x = x;
				activeTouches[i].y = y;
				break;
			}
		}
	} else if (activeTouches.length > 0) {
		// Fallback for mouse or single touch
		activeTouches[activeTouches.length - 1].x = x;
		activeTouches[activeTouches.length - 1].y = y;
	}
	// Always use the last finger for direction, even after double jump or wall hit
	if (activeTouches.length > 0 && !gameOver) {
		var lastTouch = activeTouches[activeTouches.length - 1];
		if (lastTouch && lastTouch.x < GAME_W / 2) {
			vx = -MOVE_SPEED;
		} else {
			vx = MOVE_SPEED;
		}
	} else if (!isTouching) {
		vx = 0;
	}
	// No else: vx is always set while touching, even after double jump
};
// --- Main update loop ---
game.update = function () {
	if (gameOver) return;
	// Physics
	if (typeof player.lastVy === "undefined") player.lastVy = vy;
	if (typeof player.lastVx === "undefined") player.lastVx = vx;
	// Smooth velocity interpolation for mobile performance
	// Use a simple inertia/lerp for vx to avoid abrupt changes
	var targetVx = vx;
	if (typeof player.smoothVx === "undefined") player.smoothVx = vx;
	// Increase lerp factor for even smoother and more responsive movement
	player.smoothVx += (targetVx - player.smoothVx) * 0.32; // 0.32 is more responsive and smooth
	vy += GRAVITY;
	player.x += player.smoothVx;
	player.y += vy;
	player.lastVx = player.smoothVx;
	// Clamp player to new left/right border and tumble on border hit
	if (player && typeof player.x === "number" && player.x < BORDER_LEFT_X + PLAYER_W / 2) {
		player.x = BORDER_LEFT_X + PLAYER_W / 2;
		// Tumble: rotate player quickly
		if (player && player.children && player.children.length > 0) {
			var pGfx = player.children[0];
			tween(pGfx, {
				rotation: pGfx.rotation - Math.PI * 2
			}, {
				duration: 400,
				onFinish: function onFinish() {
					pGfx.rotation = 0;
				}
			});
		}
		// Play shout sound when hitting left border, with cooldown
		if (typeof game.lastShoutTime === "undefined") game.lastShoutTime = 0;
		var nowWall = Date.now();
		if (nowWall - game.lastShoutTime > 500) {
			game.lastShoutTime = nowWall;
		}
		// Double jump when hitting the border, but only if not already double jumped without release
		if (!game.hasDoubleJumped) {
			vy = JUMP_VELOCITY * 2;
			isJumping = true;
			game.hasDoubleJumped = true;
			// Emit 18-24 animated stars from player after double jump, with color cycling and rainbow effect
			var numEmitStars = 18 + Math.floor(Math.random() * 7); // 18-24
			// Rainbow arc effect: create a rainbow container behind the player
			var rainbowArc = new Container();
			rainbowArc.x = player.x;
			rainbowArc.y = player.y - PLAYER_H / 2;
			rainbowArc._life = 0;
			rainbowArc._maxLife = 36;
			rainbowArc._rainbowSegments = [];
			var rainbowColors = [0xff3b30, 0xff9500, 0xffcc00, 0x4cd964, 0x5ac8fa, 0x007aff, 0x5856d6];
			var rainbowRadius = 110;
			var rainbowWidth = 22;
			for (var seg = 0; seg < rainbowColors.length; ++seg) {
				var segAsset = LK.getAsset('collectibleStar', {
					anchorX: 0.5,
					anchorY: 0.5,
					scaleX: rainbowWidth / 90 * (1.1 + seg * 0.08),
					scaleY: rainbowWidth / 90 * (1.1 + seg * 0.08),
					tint: rainbowColors[seg],
					alpha: 0.38
				});
				// Position in an arc behind the player
				var arcAngle = Math.PI * (0.5 + 0.7 * (seg / (rainbowColors.length - 1)));
				segAsset.x = Math.cos(arcAngle) * rainbowRadius;
				segAsset.y = Math.sin(arcAngle) * rainbowRadius * 0.7;
				rainbowArc.addChild(segAsset);
				rainbowArc._rainbowSegments.push(segAsset);
			}
			game.addChild(rainbowArc);
			// Animate rainbow arc fade and scale
			rainbowArc.update = function () {
				rainbowArc._life++;
				var t = rainbowArc._life / rainbowArc._maxLife;
				rainbowArc.alpha = 0.7 * (1 - t);
				rainbowArc.scale.x = 1 + 0.25 * t;
				rainbowArc.scale.y = 1 + 0.25 * t;
				rainbowArc.x = player.x;
				rainbowArc.y = player.y - PLAYER_H / 2;
				if (rainbowArc._life > rainbowArc._maxLife) {
					if (typeof rainbowArc.destroy === "function") rainbowArc.destroy();
				}
			};
			stars.push(rainbowArc);
			for (var emitIdx = 0; emitIdx < numEmitStars; ++emitIdx) {
				var emitStar = new Star();
				emitStar._emittedAnimation = true; // Mark as animation-only, not collectible
				emitStar.x = player.x;
				emitStar.y = player.y - PLAYER_H / 2;
				// Give each star a random direction and speed
				var angle = Math.PI * 2 * (emitIdx / numEmitStars) + (Math.random() - 0.5) * 0.5;
				var speed = 18 + Math.random() * 8;
				emitStar._vx = Math.cos(angle) * speed;
				emitStar._vy = Math.sin(angle) * speed - 6;
				emitStar._life = 0;
				emitStar._maxLife = 32 + Math.random() * 10;
				// Color cycling: pick a random start color and cycle through a palette
				var colorCycle = [0xfff7b2, 0xffe066, 0xffb347, 0xff3b30, 0x4cd964, 0x5ac8fa, 0x007aff, 0x5856d6, 0xffcc00];
				var colorIdx = Math.floor(Math.random() * colorCycle.length);
				// Override update for animation
				emitStar.update = function (star, colorIdx) {
					return function () {
						star.x += star._vx;
						star.y += star._vy;
						star._vy += 1.1; // gravity
						star._vx *= 0.96; // friction
						star._life++;
						// Color cycling: change color every 6 frames
						if (star.children && star.children[0]) {
							var cycleStep = Math.floor(star._life / 6);
							var nextColor = colorCycle[(colorIdx + cycleStep) % colorCycle.length];
							star.children[0].tint = nextColor;
							// Fade out
							star.children[0].alpha = Math.max(0, 0.92 * (1 - star._life / star._maxLife));
						}
						if (star._life > star._maxLife) {
							if (typeof star.destroy === "function") star.destroy();
							var idx = stars.indexOf(star);
							if (idx !== -1) stars.splice(idx, 1);
						}
					};
				}(emitStar, colorIdx);
				game.addChild(emitStar);
				stars.push(emitStar);
			}
			// Play shout sound only if double jump is successful
			LK.getSound('shout').play();
		}
	}
	if (player.x > BORDER_RIGHT_X - PLAYER_W / 2) {
		player.x = BORDER_RIGHT_X - PLAYER_W / 2;
		// Tumble: rotate player quickly
		if (player && player.children && player.children.length > 0) {
			var pGfx = player.children[0];
			tween(pGfx, {
				rotation: pGfx.rotation + Math.PI * 2
			}, {
				duration: 400,
				onFinish: function onFinish() {
					pGfx.rotation = 0;
				}
			});
		}
		// Play shout sound when hitting right border, with cooldown
		if (typeof game.lastShoutTime === "undefined") game.lastShoutTime = 0;
		var nowWall = Date.now();
		if (nowWall - game.lastShoutTime > 500) {
			game.lastShoutTime = nowWall;
		}
		// Double jump when hitting the border, but only if not already double jumped without release
		if (!game.hasDoubleJumped) {
			vy = JUMP_VELOCITY * 2;
			isJumping = true;
			game.hasDoubleJumped = true;
			// Emit 18-24 animated stars from player after double jump, with color cycling and rainbow effect
			var numEmitStars = 18 + Math.floor(Math.random() * 7); // 18-24
			// Rainbow arc effect: create a rainbow container behind the player
			var rainbowArc = new Container();
			rainbowArc.x = player.x;
			rainbowArc.y = player.y - PLAYER_H / 2;
			rainbowArc._life = 0;
			rainbowArc._maxLife = 36;
			rainbowArc._rainbowSegments = [];
			var rainbowColors = [0xff3b30, 0xff9500, 0xffcc00, 0x4cd964, 0x5ac8fa, 0x007aff, 0x5856d6];
			var rainbowRadius = 110;
			var rainbowWidth = 22;
			for (var seg = 0; seg < rainbowColors.length; ++seg) {
				var segAsset = LK.getAsset('collectibleStar', {
					anchorX: 0.5,
					anchorY: 0.5,
					scaleX: rainbowWidth / 90 * (1.1 + seg * 0.08),
					scaleY: rainbowWidth / 90 * (1.1 + seg * 0.08),
					tint: rainbowColors[seg],
					alpha: 0.38
				});
				// Position in an arc behind the player
				var arcAngle = Math.PI * (0.5 + 0.7 * (seg / (rainbowColors.length - 1)));
				segAsset.x = Math.cos(arcAngle) * rainbowRadius;
				segAsset.y = Math.sin(arcAngle) * rainbowRadius * 0.7;
				rainbowArc.addChild(segAsset);
				rainbowArc._rainbowSegments.push(segAsset);
			}
			game.addChild(rainbowArc);
			// Animate rainbow arc fade and scale
			rainbowArc.update = function () {
				rainbowArc._life++;
				var t = rainbowArc._life / rainbowArc._maxLife;
				rainbowArc.alpha = 0.7 * (1 - t);
				rainbowArc.scale.x = 1 + 0.25 * t;
				rainbowArc.scale.y = 1 + 0.25 * t;
				rainbowArc.x = player.x;
				rainbowArc.y = player.y - PLAYER_H / 2;
				if (rainbowArc._life > rainbowArc._maxLife) {
					if (typeof rainbowArc.destroy === "function") rainbowArc.destroy();
				}
			};
			stars.push(rainbowArc);
			for (var emitIdx = 0; emitIdx < numEmitStars; ++emitIdx) {
				var emitStar = new Star();
				emitStar._emittedAnimation = true; // Mark as animation-only, not collectible
				emitStar.x = player.x;
				emitStar.y = player.y - PLAYER_H / 2;
				// Give each star a random direction and speed
				var angle = Math.PI * 2 * (emitIdx / numEmitStars) + (Math.random() - 0.5) * 0.5;
				var speed = 18 + Math.random() * 8;
				emitStar._vx = Math.cos(angle) * speed;
				emitStar._vy = Math.sin(angle) * speed - 6;
				emitStar._life = 0;
				emitStar._maxLife = 32 + Math.random() * 10;
				// Color cycling: pick a random start color and cycle through a palette
				var colorCycle = [0xfff7b2, 0xffe066, 0xffb347, 0xff3b30, 0x4cd964, 0x5ac8fa, 0x007aff, 0x5856d6, 0xffcc00];
				var colorIdx = Math.floor(Math.random() * colorCycle.length);
				// Override update for animation
				emitStar.update = function (star, colorIdx) {
					return function () {
						star.x += star._vx;
						star.y += star._vy;
						star._vy += 1.1; // gravity
						star._vx *= 0.96; // friction
						star._life++;
						// Color cycling: change color every 6 frames
						if (star.children && star.children[0]) {
							var cycleStep = Math.floor(star._life / 6);
							var nextColor = colorCycle[(colorIdx + cycleStep) % colorCycle.length];
							star.children[0].tint = nextColor;
							// Fade out
							star.children[0].alpha = Math.max(0, 0.92 * (1 - star._life / star._maxLife));
						}
						if (star._life > star._maxLife) {
							if (typeof star.destroy === "function") star.destroy();
							var idx = stars.indexOf(star);
							if (idx !== -1) stars.splice(idx, 1);
						}
					};
				}(emitStar, colorIdx);
				game.addChild(emitStar);
				stars.push(emitStar);
			}
			// Play shout sound only if double jump is successful
			LK.getSound('shout').play();
		}
	}
	// Platform collision
	var plat = playerOnPlatform();
	// (Removed logic that made checkpoint platforms appear after passing. Now, checkpoint platforms always come down from the top like other platforms.)
	// --- Increment platformsPassed when player passes a platform (crosses its top Y going down) ---
	if (typeof player.lastPlatformY === "undefined") player.lastPlatformY = null;
	if (plat && vy > 0) {
		// Only increment if this is a new platform (not the same as last landed)
		if (!plat._countedPassed) {
			platformsPassed++;
			plat._countedPassed = true;
		}
		player.y = plat.y - PLATFORM_H / 2;
		vy = JUMP_VELOCITY;
		isJumping = false;
		game.hasDoubleJumped = false; // Reset double jump lock only when landing
		// Always play jump animation here for consistency
		if (player && player.children && player.children.length > 0) {
			var pGfx = player.children[0];
			// Squash down, stretch wide, add a little rotation (no color change)
			tween(pGfx, {
				scaleY: 0.7,
				scaleX: 1.25,
				rotation: 0.18
			}, {
				duration: 90,
				onFinish: function onFinish() {
					// Stretch up, squash in, overshoot a bit for bounce
					tween(pGfx, {
						scaleY: 1.18 * PLAYER_H / 320,
						scaleX: 0.88 * PLAYER_W / 320,
						rotation: -0.08
					}, {
						duration: 90,
						onFinish: function onFinish() {
							// Return to normal
							tween(pGfx, {
								scaleY: PLAYER_H / 320,
								scaleX: PLAYER_W / 320,
								rotation: 0
							}, {
								duration: 90
							});
						}
					});
				}
			});
		}
	} else {
		isJumping = true;
		// No shout or fall sound here
	}
	// --- Coin collection ---
	// Use last position to detect passing through coins, not just landing on top
	if (typeof player.lastX === "undefined") player.lastX = player.x;
	if (typeof player.lastY === "undefined") player.lastY = player.y;
	for (var j = coins.length - 1; j >= 0; --j) {
		var coin = coins[j];
		// Simple circle collision, check both current and previous position for pass-through
		var dx = player.x - coin.x;
		var dy = player.y - PLAYER_H / 2 - coin.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		var lastDx = player.lastX - coin.x;
		var lastDy = player.lastY - PLAYER_H / 2 - coin.y;
		var lastDist = Math.sqrt(lastDx * lastDx + lastDy * lastDy);
		var collectRadius = (PLAYER_W / 2 + coin.radius) * 0.7;
		// If player is within collect radius now or passed through it this frame
		if (dist < collectRadius || lastDist > collectRadius && dist < collectRadius || lastDist < collectRadius && dist < collectRadius) {
			// Collect coin
			coin.showValuePopup();
			// Add to score (platformsPassed is main score, but we can show a popup)
			platformsPassed += coin.value;
			// Add to coins collected
			coinsCollected += coin.value;
			coins.splice(j, 1);
			coin.destroy();
		}
	}
	// --- Star collection ---
	// Use last position to detect passing through stars, not just landing on top
	for (var j = stars.length - 1; j >= 0; --j) {
		var star = stars[j];
		var dx = player.x - star.x;
		var dy = player.y - PLAYER_H / 2 - star.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		var lastDx = player.lastX - star.x;
		var lastDy = player.lastY - PLAYER_H / 2 - star.y;
		var lastDist = Math.sqrt(lastDx * lastDx + lastDy * lastDy);
		var collectRadius = (PLAYER_W / 2 + star.radius) * 0.7;
		// Only collect stars that are not "emitted" animation stars (i.e., only collectible platform stars)
		// We'll mark emitted stars with a flag: star._emittedAnimation === true
		if ((dist < collectRadius || lastDist > collectRadius && dist < collectRadius || lastDist < collectRadius && dist < collectRadius) && !star._emittedAnimation) {
			// Collect star
			star.showValuePopup();
			// Add to score (stars give +10)
			platformsPassed += star.value;
			coinsCollected += star.value;
			stars.splice(j, 1);
			star.destroy();
		}
	}
	// Update lastX/lastY for next frame
	player.lastX = player.x;
	player.lastY = player.y;
	// Camera follows player upward
	if (player.y < GAME_H - CAMERA_OFFSET) {
		var diff = GAME_H - CAMERA_OFFSET - player.y;
		cameraY += diff;
		// Move all platforms and player down by diff
		for (var i = 0; i < platforms.length; ++i) {
			platforms[i].y += diff;
		}
		// Move all coins down by diff so they stay visually attached to their platform
		for (var i = 0; i < coins.length; ++i) {
			coins[i].y += diff;
		}
		// Move all stars down by diff so they stay visually attached to their platform
		for (var i = 0; i < stars.length; ++i) {
			stars[i].y += diff;
		}
		// Move all clouds down by diff, and update their position
		for (var i = clouds.length - 1; i >= 0; --i) {
			var cloud = clouds[i];
			cloud.y += diff * 0.6; // Parallax: move slower than platforms for depth
			cloud.update && cloud.update();
			// Remove cloud if it goes off bottom, add new one at top
			if (cloud.y > GAME_H + 200) {
				cloud.destroy();
				clouds.splice(i, 1);
				// Add new cloud at top
				var newCloud = new Cloud();
				newCloud.x = Math.random() * GAME_W;
				newCloud.y = -100 - Math.random() * 200;
				game.addChild(newCloud);
				newCloud.setToBack && newCloud.setToBack();
				clouds.push(newCloud);
			}
		}
		player.y += diff;
		maxHeight += diff;
	}
	// Always keep player in front of platforms
	if (player.parent && player.parent.children.indexOf(player) !== player.parent.children.length - 1) {
		player.parent.setChildIndex(player, player.parent.children.length - 1);
	}
	// Remove platforms that are off screen, add new ones at top
	for (var i = platforms.length - 1; i >= 0; --i) {
		if (platforms[i].y > GAME_H + 100) {
			// Remove any coins that are visually on this platform (within platform width and just above it)
			for (var j = coins.length - 1; j >= 0; --j) {
				var coin = coins[j];
				// Coin is considered on this platform if its x is within platform width and y is just above platform
				if (coin.x >= platforms[i].x - platforms[i].width / 2 && coin.x <= platforms[i].x + platforms[i].width / 2 && Math.abs(coin.y - (platforms[i].y - PLATFORM_H / 2 - 40)) < 60) {
					coin.destroy();
					coins.splice(j, 1);
				}
			}
			// Remove any stars that are visually on this platform (within platform width and just above it)
			for (var j = stars.length - 1; j >= 0; --j) {
				var star = stars[j];
				if (star.x >= platforms[i].x - platforms[i].width / 2 && star.x <= platforms[i].x + platforms[i].width / 2 && Math.abs(star.y - (platforms[i].y - PLATFORM_H / 2 - 100)) < 80) {
					star.destroy();
					stars.splice(j, 1);
				}
			}
			platforms[i].destroy();
			platforms.splice(i, 1);
		}
	}
	// Add new platforms if needed
	while (platforms.length < 12) {
		var topY = platforms[0].y;
		// Make platform width and spacing harder as level increases
		var level = getThemeIndex(platformsPassed);
		var EASY_PLATFORM_W = 820 - level * 40;
		if (EASY_PLATFORM_W < 220) EASY_PLATFORM_W = 220;
		// Keep vertical spacing constant for all levels
		var EASY_PLATFORM_SPACING = 240;
		var newY = topY - EASY_PLATFORM_SPACING;
		var prevPlat = platforms[0];
		var px = getSafePlatformX(prevPlat, EASY_PLATFORM_W);
		var plat = createPlatform(px, newY, EASY_PLATFORM_W);
		platforms.sort(function (a, b) {
			return a.y - b.y;
		});
	}
	// Score: based on platforms passed
	scoreTxt.setText(platformsPassed.toString());
	// Update coins label to show current coins collected
	coinsLabelTxt.setText('Coins: ' + coinsCollected);
	// Update the sign on the last platform of each theme to show current platforms passed
	for (var i = 0; i < platforms.length; ++i) {
		var plat = platforms[i];
		if (plat._themeSign && typeof plat._themeSign.setPlatformsPassed === "function") {
			plat._themeSign.setPlatformsPassed(platformsPassed);
		}
	}
	// Change background color if level changes
	var themeIndex = getThemeIndex(platformsPassed);
	if (game.lastThemeIndex !== themeIndex) {
		// Use bgTheme asset classes for background on level change
		var bgThemeAssets = [['bgThemeGrassOpaque', 'bgThemeGrassTrans'],
		// 0 Grass
		['bgThemeForestOpaque', 'bgThemeForestTrans'],
		// 1 Forest
		['bgThemeMudOpaque', 'bgThemeMudTrans'],
		// 2 Mud
		['bgThemeMagicOpaque', 'bgThemeMagicTrans'],
		// 3 Magic
		['bgThemeCandyOpaque', 'bgThemeCandyTrans'],
		// 4 Candy
		['bgThemeNightOpaque', 'bgThemeNightTrans'],
		// 5 Night
		['bgThemeStoneOpaque', 'bgThemeStoneTrans'],
		// 6 Stone
		['bgThemeIceOpaque', 'bgThemeIceTrans'],
		// 7 Ice
		['bgThemeMetalOpaque', 'bgThemeMetalTrans'],
		// 8 Metal
		['bgThemeNeonOpaque', 'bgThemeNeonTrans'],
		// 9 Neon
		['bgThemeSpecialOpaque', 'bgThemeSpecialTrans'] // 10 Special
		];
		var idx = themeIndex;
		if (idx < 0) idx = 0;
		if (idx >= bgThemeAssets.length) idx = bgThemeAssets.length - 1;
		// Remove previous background asset if any
		if (game._bgThemeAsset) {
			if (typeof game._bgThemeAsset.destroy === "function") {
				game._bgThemeAsset.destroy();
			}
			game._bgThemeAsset = null;
		}
		// Add new background asset as the first child (behind everything)
		var bgOpaqueAssetId = bgThemeAssets[idx][0];
		var bgTransAssetId = bgThemeAssets[idx][1];
		// Create a container for the background with three segments: left, center, right
		var bgThemeContainer = new Container();
		var bgOpaqueAssetInfo = LK.getAsset(bgOpaqueAssetId, {
			anchorX: 0,
			anchorY: 0
		});
		var bgTransAssetInfo = LK.getAsset(bgTransAssetId, {
			anchorX: 0,
			anchorY: 0
		});
		var bgWidth = GAME_W;
		var leftW = Math.floor(bgWidth / 30);
		var rightW = Math.floor(bgWidth / 30);
		var centerW = bgWidth - leftW - rightW;
		// Left 1/30 (opaque)
		var bgLeft = LK.getAsset(bgOpaqueAssetId, {
			anchorX: 0,
			anchorY: 0,
			x: 0,
			y: 0,
			scaleX: leftW / bgOpaqueAssetInfo.width,
			scaleY: GAME_H / bgOpaqueAssetInfo.height,
			alpha: 1
		});
		bgThemeContainer.addChild(bgLeft);
		// Center (transparent)
		var bgCenter = LK.getAsset(bgTransAssetId, {
			anchorX: 0,
			anchorY: 0,
			x: leftW,
			y: 0,
			scaleX: centerW / bgTransAssetInfo.width,
			scaleY: GAME_H / bgTransAssetInfo.height,
			alpha: 0.3
		});
		bgThemeContainer.addChild(bgCenter);
		// Right 1/30 (opaque)
		var bgRight = LK.getAsset(bgOpaqueAssetId, {
			anchorX: 0,
			anchorY: 0,
			x: leftW + centerW,
			y: 0,
			scaleX: rightW / bgOpaqueAssetInfo.width,
			scaleY: GAME_H / bgOpaqueAssetInfo.height,
			alpha: 1
		});
		bgThemeContainer.addChild(bgRight);
		game.addChild(bgThemeContainer);
		if (game.children && game.children.length > 1) {
			game.setChildIndex(bgThemeContainer, 0);
		}
		game._bgThemeAsset = bgThemeContainer;
		game.lastThemeIndex = themeIndex;
	}
	// High score logic (still based on maxHeight climbed)
	var score = Math.floor(maxHeight / 10);
	if (score > highScore) {
		highScore = score;
		storage.highScore = highScore;
		highScoreTxt.setText('Best: ' + highScore);
	}
	// Game over: fall below screen
	if (player.y > GAME_H + 200) {
		gameOver = true;
		// Play fall sound when it's certain the player is going to die
		LK.getSound('fall').play();
		// Show game over after short delay
		LK.setTimeout(function () {
			LK.showGameOver();
		}, 1200);
	}
	// Update lastVy for next frame
	player.lastVy = vy;
	// Update clouds for horizontal drift (even if camera doesn't move)
	for (var i = 0; i < clouds.length; ++i) {
		if (clouds[i] && typeof clouds[i].update === "function") {
			clouds[i].update();
		}
	}
	// Update stars for animation
	for (var i = 0; i < stars.length; ++i) {
		if (stars[i] && typeof stars[i].update === "function") {
			stars[i].update();
		}
	}
	// (Cloud update and spawn logic removed)
};
// --- Start game ---
resetGame();

===================================================================
--- original.js
+++ change.js
@@ -1169,9 +1169,16 @@
 	}
 	// Platform collision
 	var plat = playerOnPlatform();
 	// (Removed logic that made checkpoint platforms appear after passing. Now, checkpoint platforms always come down from the top like other platforms.)
+	// --- Increment platformsPassed when player passes a platform (crosses its top Y going down) ---
+	if (typeof player.lastPlatformY === "undefined") player.lastPlatformY = null;
 	if (plat && vy > 0) {
+		// Only increment if this is a new platform (not the same as last landed)
+		if (!plat._countedPassed) {
+			platformsPassed++;
+			plat._countedPassed = true;
+		}
 		player.y = plat.y - PLATFORM_H / 2;
 		vy = JUMP_VELOCITY;
 		isJumping = false;
 		game.hasDoubleJumped = false; // Reset double jump lock only when landing
@@ -1325,11 +1332,8 @@
 				}
 			}
 			platforms[i].destroy();
 			platforms.splice(i, 1);
-			// Only increment platformsPassed if not incremented by coin
-			// Always increment for platform0 as well so it is counted
-			platformsPassed++;
 		}
 	}
 	// Add new platforms if needed
 	while (platforms.length < 12) {