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

/**** 
* Classes
****/ 
// Obstacle class (tall block)
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obsSprite = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = 22;
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerSprite = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Physics
	self.vy = 0;
	self.isJumping = false;
	self.gravity = 2.2;
	self.jumpStrength = -48;
	self.groundY = 0; // Set after ground is created
	// Update method
	self.update = function () {
		// Apply gravity
		self.vy += self.gravity;
		self.y += self.vy;
		// Ground collision
		if (self.y > self.groundY) {
			self.y = self.groundY;
			self.vy = 0;
			self.isJumping = false;
		}
	};
	// Jump method
	self.jump = function () {
		if (!self.isJumping && self.y >= self.groundY) {
			self.vy = self.jumpStrength;
			self.isJumping = true;
		}
	};
	return self;
});
// Spike class (obstacle)
var Spike = Container.expand(function () {
	var self = Container.call(this);
	var spikeSprite = self.attachAsset('spike', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = 22; // Moves left
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222831
});

/**** 
* Game Code
****/ 
// Obstacle: purple rectangle
// Spike: red triangle (approximate with a tall, thin box for MVP)
// Ground: gray rectangle
// Player: blue square
// --- LEVEL DATA ---
var LEVELS = [{
	name: "First Steps",
	difficulty: "Easy",
	color: 0x2ecc71,
	minGap: 800,
	maxGap: 1200,
	types: ['spike'],
	intro: "Welcome to your first steps!"
}, {
	name: "Erin's Adventure",
	difficulty: "Medium",
	color: 0xf1c40f,
	minGap: 650,
	maxGap: 1050,
	types: ['spike', 'obstacle'],
	intro: "A trickier journey awaits."
}, {
	name: "Final Steps",
	difficulty: "Hard",
	color: 0xe74c3c,
	minGap: 500,
	maxGap: 900,
	types: ['spike', 'obstacle', 'spike'],
	intro: "Only the brave survive!"
}];
// --- MENU STATE ---
var MENU_STATE = {
	MAIN: 0,
	LEVEL_SELECT: 1,
	PLAYING: 2
};
var menuState = MENU_STATE.MAIN;
var selectedLevel = 0;
// --- UI ELEMENTS ---
var menuContainer = new Container();
var levelSelectContainer = new Container();
var introText = null;
// --- GAME CONSTANTS ---
var GROUND_HEIGHT = 120;
var PLAYER_SIZE = 120;
var PLAYER_START_X = 400;
var OBSTACLE_MIN_GAP = 600;
var OBSTACLE_MAX_GAP = 1100;
var OBSTACLE_TYPES = ['spike', 'obstacle'];
var OBSTACLE_Y = 2732 - GROUND_HEIGHT;
// --- GAME STATE ---
var player;
var ground;
var obstacles = [];
var score = 0;
var scoreTxt;
var lastObstacleX = 0;
var isGameOver = false;
// --- UI HELPERS ---
function clearMenuUI() {
	if (menuContainer.parent) menuContainer.parent.removeChild(menuContainer);
	if (levelSelectContainer.parent) levelSelectContainer.parent.removeChild(levelSelectContainer);
	if (introText && introText.parent) introText.parent.removeChild(introText);
}
// --- MAIN MENU ---
function showMainMenu() {
	clearMenuUI();
	menuState = MENU_STATE.MAIN;
	menuContainer.removeChildren();
	// Title
	var title = new Text2("Geometry Dash", {
		size: 180,
		fill: 0xFFFFFF
	});
	title.anchor.set(0.5, 0);
	title.x = 2048 / 2;
	title.y = 400;
	menuContainer.addChild(title);
	// Play button
	var playBtn = new Text2("Play", {
		size: 140,
		fill: 0x2ECC71
	});
	playBtn.anchor.set(0.5, 0.5);
	playBtn.x = 2048 / 2;
	playBtn.y = 1000;
	playBtn.interactive = true;
	playBtn.buttonMode = true;
	playBtn.down = function () {
		showLevelSelect();
	};
	menuContainer.addChild(playBtn);
	// Add to game
	game.addChild(menuContainer);
}
// --- LEVEL SELECT MENU ---
function showLevelSelect() {
	clearMenuUI();
	menuState = MENU_STATE.LEVEL_SELECT;
	levelSelectContainer.removeChildren();
	// Title
	var selTitle = new Text2("Select Level", {
		size: 150,
		fill: 0xFFFFFF
	});
	selTitle.anchor.set(0.5, 0);
	selTitle.x = 2048 / 2;
	selTitle.y = 300;
	levelSelectContainer.addChild(selTitle);
	// Level buttons
	for (var i = 0; i < LEVELS.length; i++) {
		(function (idx) {
			var lvl = LEVELS[idx];
			var btn = new Text2(lvl.name + " (" + lvl.difficulty + ")", {
				size: 110,
				fill: "#" + lvl.color.toString(16).padStart(6, "0")
			});
			btn.anchor.set(0.5, 0.5);
			btn.x = 2048 / 2;
			btn.y = 600 + idx * 250;
			btn.interactive = true;
			btn.buttonMode = true;
			btn.down = function () {
				selectedLevel = idx;
				showLevelIntro();
			};
			levelSelectContainer.addChild(btn);
		})(i);
	}
	// Back button
	var backBtn = new Text2("Back", {
		size: 90,
		fill: 0x888888
	});
	backBtn.anchor.set(0.5, 0.5);
	backBtn.x = 2048 / 2;
	backBtn.y = 600 + LEVELS.length * 250 + 100;
	backBtn.interactive = true;
	backBtn.buttonMode = true;
	backBtn.down = function () {
		showMainMenu();
	};
	levelSelectContainer.addChild(backBtn);
	game.addChild(levelSelectContainer);
}
// --- LEVEL INTRO ---
function showLevelIntro() {
	clearMenuUI();
	menuState = MENU_STATE.LEVEL_SELECT;
	var lvl = LEVELS[selectedLevel];
	introText = new Text2(lvl.name + "\nDifficulty: " + lvl.difficulty + "\n\n" + lvl.intro + "\n\nTap to Start", {
		size: 100,
		fill: "#" + lvl.color.toString(16).padStart(6, "0"),
		align: "center"
	});
	introText.anchor.set(0.5, 0.5);
	introText.x = 2048 / 2;
	introText.y = 1200;
	introText.interactive = true;
	introText.buttonMode = true;
	introText.down = function () {
		startLevel(selectedLevel);
	};
	game.addChild(introText);
}
// --- START LEVEL ---
function startLevel(levelIdx) {
	clearMenuUI();
	menuState = MENU_STATE.PLAYING;
	// Set level params
	var lvl = LEVELS[levelIdx];
	OBSTACLE_MIN_GAP = lvl.minGap;
	OBSTACLE_MAX_GAP = lvl.maxGap;
	OBSTACLE_TYPES = lvl.types;
	// Reset game state
	resetGame();
	// Show score
	scoreTxt.setText("0");
	scoreTxt.visible = true;
	// Show ground and player
	if (!ground) {
		ground = LK.getAsset('ground', {
			anchorX: 0,
			anchorY: 1,
			x: 0,
			y: 2732
		});
		game.addChild(ground);
	}
	if (!player) {
		player = new Player();
		player.x = PLAYER_START_X;
		player.groundY = 2732 - GROUND_HEIGHT;
		player.y = player.groundY;
		game.addChild(player);
	}
	// Initial obstacle
	lastObstacleX = 1200;
	spawnObstacle();
}
// --- SCORE TEXT ---
scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.visible = false;
// --- INITIALIZE: show main menu ---
showMainMenu();
// Helper: spawn obstacle
function spawnObstacle() {
	// Randomly pick type
	var type = OBSTACLE_TYPES[Math.floor(Math.random() * OBSTACLE_TYPES.length)];
	var obs;
	if (type === 'spike') {
		obs = new Spike();
		obs.x = 2048 + 100;
		obs.y = OBSTACLE_Y;
	} else {
		obs = new Obstacle();
		obs.x = 2048 + 100;
		obs.y = OBSTACLE_Y;
	}
	obstacles.push(obs);
	game.addChild(obs);
	lastObstacleX = obs.x;
}
// Helper: reset game state
function resetGame() {
	// Remove obstacles
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].destroy();
	}
	obstacles = [];
	// Reset player
	player.x = PLAYER_START_X;
	player.y = player.groundY;
	player.vy = 0;
	player.isJumping = false;
	// Reset score
	score = 0;
	scoreTxt.setText(score);
	lastObstacleX = 1200;
	isGameOver = false;
}
// Touch/click to jump
game.down = function (x, y, obj) {
	if (menuState !== MENU_STATE.PLAYING) return;
	if (isGameOver) return;
	player.jump();
};
// Main update loop
game.update = function () {
	if (menuState !== MENU_STATE.PLAYING) return;
	if (isGameOver) return;
	// Update player
	player.update();
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obs = obstacles[i];
		obs.update();
		// Remove if off screen
		if (obs.x < -200) {
			obs.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision detection
		if (player.intersects(obs)) {
			LK.effects.flashScreen(0xff0000, 800);
			isGameOver = true;
			LK.setTimeout(function () {
				LK.showGameOver();
			}, 600);
			return;
		}
	}
	// Score: increase as player passes obstacles
	for (var j = 0; j < obstacles.length; j++) {
		var o = obstacles[j];
		if (!o.passed && o.x + 60 < player.x) {
			o.passed = true;
			score += 1;
			scoreTxt.setText(score);
		}
	}
	// Spawn new obstacles
	if (obstacles.length === 0 || 2048 - lastObstacleX > OBSTACLE_MIN_GAP + Math.floor(Math.random() * (OBSTACLE_MAX_GAP - OBSTACLE_MIN_GAP))) {
		spawnObstacle();
	}
};
// Reset game on game over
LK.on('gameover', function () {
	scoreTxt.visible = false;
	showMainMenu();
});

===================================================================
--- original.js
+++ change.js
@@ -80,45 +80,214 @@
 // Obstacle: purple rectangle
 // Spike: red triangle (approximate with a tall, thin box for MVP)
 // Ground: gray rectangle
 // Player: blue square
-// Constants
+// --- LEVEL DATA ---
+var LEVELS = [{
+	name: "First Steps",
+	difficulty: "Easy",
+	color: 0x2ecc71,
+	minGap: 800,
+	maxGap: 1200,
+	types: ['spike'],
+	intro: "Welcome to your first steps!"
+}, {
+	name: "Erin's Adventure",
+	difficulty: "Medium",
+	color: 0xf1c40f,
+	minGap: 650,
+	maxGap: 1050,
+	types: ['spike', 'obstacle'],
+	intro: "A trickier journey awaits."
+}, {
+	name: "Final Steps",
+	difficulty: "Hard",
+	color: 0xe74c3c,
+	minGap: 500,
+	maxGap: 900,
+	types: ['spike', 'obstacle', 'spike'],
+	intro: "Only the brave survive!"
+}];
+// --- MENU STATE ---
+var MENU_STATE = {
+	MAIN: 0,
+	LEVEL_SELECT: 1,
+	PLAYING: 2
+};
+var menuState = MENU_STATE.MAIN;
+var selectedLevel = 0;
+// --- UI ELEMENTS ---
+var menuContainer = new Container();
+var levelSelectContainer = new Container();
+var introText = null;
+// --- GAME CONSTANTS ---
 var GROUND_HEIGHT = 120;
 var PLAYER_SIZE = 120;
 var PLAYER_START_X = 400;
 var OBSTACLE_MIN_GAP = 600;
 var OBSTACLE_MAX_GAP = 1100;
 var OBSTACLE_TYPES = ['spike', 'obstacle'];
 var OBSTACLE_Y = 2732 - GROUND_HEIGHT;
-// Game state
+// --- GAME STATE ---
 var player;
 var ground;
 var obstacles = [];
 var score = 0;
 var scoreTxt;
 var lastObstacleX = 0;
 var isGameOver = false;
-// Create ground
-ground = LK.getAsset('ground', {
-	anchorX: 0,
-	anchorY: 1,
-	x: 0,
-	y: 2732
-});
-game.addChild(ground);
-// Create player
-player = new Player();
-player.x = PLAYER_START_X;
-player.groundY = 2732 - GROUND_HEIGHT;
-player.y = player.groundY;
-game.addChild(player);
-// Score text
+// --- UI HELPERS ---
+function clearMenuUI() {
+	if (menuContainer.parent) menuContainer.parent.removeChild(menuContainer);
+	if (levelSelectContainer.parent) levelSelectContainer.parent.removeChild(levelSelectContainer);
+	if (introText && introText.parent) introText.parent.removeChild(introText);
+}
+// --- MAIN MENU ---
+function showMainMenu() {
+	clearMenuUI();
+	menuState = MENU_STATE.MAIN;
+	menuContainer.removeChildren();
+	// Title
+	var title = new Text2("Geometry Dash", {
+		size: 180,
+		fill: 0xFFFFFF
+	});
+	title.anchor.set(0.5, 0);
+	title.x = 2048 / 2;
+	title.y = 400;
+	menuContainer.addChild(title);
+	// Play button
+	var playBtn = new Text2("Play", {
+		size: 140,
+		fill: 0x2ECC71
+	});
+	playBtn.anchor.set(0.5, 0.5);
+	playBtn.x = 2048 / 2;
+	playBtn.y = 1000;
+	playBtn.interactive = true;
+	playBtn.buttonMode = true;
+	playBtn.down = function () {
+		showLevelSelect();
+	};
+	menuContainer.addChild(playBtn);
+	// Add to game
+	game.addChild(menuContainer);
+}
+// --- LEVEL SELECT MENU ---
+function showLevelSelect() {
+	clearMenuUI();
+	menuState = MENU_STATE.LEVEL_SELECT;
+	levelSelectContainer.removeChildren();
+	// Title
+	var selTitle = new Text2("Select Level", {
+		size: 150,
+		fill: 0xFFFFFF
+	});
+	selTitle.anchor.set(0.5, 0);
+	selTitle.x = 2048 / 2;
+	selTitle.y = 300;
+	levelSelectContainer.addChild(selTitle);
+	// Level buttons
+	for (var i = 0; i < LEVELS.length; i++) {
+		(function (idx) {
+			var lvl = LEVELS[idx];
+			var btn = new Text2(lvl.name + " (" + lvl.difficulty + ")", {
+				size: 110,
+				fill: "#" + lvl.color.toString(16).padStart(6, "0")
+			});
+			btn.anchor.set(0.5, 0.5);
+			btn.x = 2048 / 2;
+			btn.y = 600 + idx * 250;
+			btn.interactive = true;
+			btn.buttonMode = true;
+			btn.down = function () {
+				selectedLevel = idx;
+				showLevelIntro();
+			};
+			levelSelectContainer.addChild(btn);
+		})(i);
+	}
+	// Back button
+	var backBtn = new Text2("Back", {
+		size: 90,
+		fill: 0x888888
+	});
+	backBtn.anchor.set(0.5, 0.5);
+	backBtn.x = 2048 / 2;
+	backBtn.y = 600 + LEVELS.length * 250 + 100;
+	backBtn.interactive = true;
+	backBtn.buttonMode = true;
+	backBtn.down = function () {
+		showMainMenu();
+	};
+	levelSelectContainer.addChild(backBtn);
+	game.addChild(levelSelectContainer);
+}
+// --- LEVEL INTRO ---
+function showLevelIntro() {
+	clearMenuUI();
+	menuState = MENU_STATE.LEVEL_SELECT;
+	var lvl = LEVELS[selectedLevel];
+	introText = new Text2(lvl.name + "\nDifficulty: " + lvl.difficulty + "\n\n" + lvl.intro + "\n\nTap to Start", {
+		size: 100,
+		fill: "#" + lvl.color.toString(16).padStart(6, "0"),
+		align: "center"
+	});
+	introText.anchor.set(0.5, 0.5);
+	introText.x = 2048 / 2;
+	introText.y = 1200;
+	introText.interactive = true;
+	introText.buttonMode = true;
+	introText.down = function () {
+		startLevel(selectedLevel);
+	};
+	game.addChild(introText);
+}
+// --- START LEVEL ---
+function startLevel(levelIdx) {
+	clearMenuUI();
+	menuState = MENU_STATE.PLAYING;
+	// Set level params
+	var lvl = LEVELS[levelIdx];
+	OBSTACLE_MIN_GAP = lvl.minGap;
+	OBSTACLE_MAX_GAP = lvl.maxGap;
+	OBSTACLE_TYPES = lvl.types;
+	// Reset game state
+	resetGame();
+	// Show score
+	scoreTxt.setText("0");
+	scoreTxt.visible = true;
+	// Show ground and player
+	if (!ground) {
+		ground = LK.getAsset('ground', {
+			anchorX: 0,
+			anchorY: 1,
+			x: 0,
+			y: 2732
+		});
+		game.addChild(ground);
+	}
+	if (!player) {
+		player = new Player();
+		player.x = PLAYER_START_X;
+		player.groundY = 2732 - GROUND_HEIGHT;
+		player.y = player.groundY;
+		game.addChild(player);
+	}
+	// Initial obstacle
+	lastObstacleX = 1200;
+	spawnObstacle();
+}
+// --- SCORE TEXT ---
 scoreTxt = new Text2('0', {
 	size: 120,
 	fill: 0xFFFFFF
 });
 scoreTxt.anchor.set(0.5, 0);
 LK.gui.top.addChild(scoreTxt);
+scoreTxt.visible = false;
+// --- INITIALIZE: show main menu ---
+showMainMenu();
 // Helper: spawn obstacle
 function spawnObstacle() {
 	// Randomly pick type
 	var type = OBSTACLE_TYPES[Math.floor(Math.random() * OBSTACLE_TYPES.length)];
@@ -155,13 +324,15 @@
 	isGameOver = false;
 }
 // Touch/click to jump
 game.down = function (x, y, obj) {
+	if (menuState !== MENU_STATE.PLAYING) return;
 	if (isGameOver) return;
 	player.jump();
 };
 // Main update loop
 game.update = function () {
+	if (menuState !== MENU_STATE.PLAYING) return;
 	if (isGameOver) return;
 	// Update player
 	player.update();
 	// Update obstacles
@@ -175,9 +346,8 @@
 			continue;
 		}
 		// Collision detection
 		if (player.intersects(obs)) {
-			// Flash screen and game over
 			LK.effects.flashScreen(0xff0000, 800);
 			isGameOver = true;
 			LK.setTimeout(function () {
 				LK.showGameOver();
@@ -200,9 +370,7 @@
 	}
 };
 // Reset game on game over
 LK.on('gameover', function () {
-	resetGame();
-});
-// Initial obstacle
-lastObstacleX = 1200;
-spawnObstacle();
\ No newline at end of file
+	scoreTxt.visible = false;
+	showMainMenu();
+});
\ No newline at end of file