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

/**** 
* Classes
****/ 
var Note = Container.expand(function (type, lane) {
	var self = Container.call(this);
	self.type = type || 'regular'; // 'regular' or 'hold'
	self.lane = lane || 0;
	self.speed = 8;
	self.hit = false;
	self.missed = false;
	self.holdPressed = false;
	self.holdDuration = 0;
	self.maxHoldDuration = 0;
	self.colorIndex = Math.floor(Math.random() * 5) + 1; // 1-5 for different colors
	self.lastY = self.y;
	// Musical note symbols
	var symbols = ['1', '2', '3', '4', '5', '6', '7', '8', '§', '∆', '×', '÷', 'π', '√', '✓', '>', '<'];
	self.symbol = symbols[(self.colorIndex - 1) % symbols.length];
	// Create note graphics based on type
	if (self.type === 'hold') {
		self.noteGraphics = self.attachAsset('noteHold' + self.colorIndex, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		self.maxHoldDuration = 60; // 1 second at 60fps
	} else {
		self.noteGraphics = self.attachAsset('noteRegular' + self.colorIndex, {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
	// Add text symbol
	self.symbolText = new Text2(self.symbol, {
		size: 60,
		fill: 0xffffff
	});
	self.symbolText.anchor.set(0.5, 0.5);
	self.addChild(self.symbolText);
	// Position based on lane
	self.x = 256 + self.lane * 384; // 4 lanes across screen
	self.y = -100;
	self.lastY = self.y;
	self.update = function () {
		self.lastY = self.y;
		self.y += self.speed;
		// Add pulsing glow effect
		var pulse = Math.sin(LK.ticks * 0.2) * 0.2 + 0.8;
		self.noteGraphics.alpha = pulse;
		self.alpha = pulse;
		// Check if note is in hit zone
		var hitZoneY = 2732 - 300;
		var distanceFromHitZone = Math.abs(self.y - hitZoneY);
		// Miss detection - transition from inside to outside hit zone
		if (self.lastY <= hitZoneY + 100 && self.y > hitZoneY + 100 && !self.hit && !self.missed) {
			self.missed = true;
			combo = 0;
			accuracy.total++;
			accuracy.missed++;
			LK.getSound('miss').play();
		}
		// Handle hold notes
		if (self.type === 'hold' && self.hit && self.holdPressed) {
			self.holdDuration++;
			// Change opacity while holding
			self.noteGraphics.alpha = 0.5;
		}
	};
	return self;
});
var ParticleEffect = Container.expand(function (x, y, color) {
	var self = Container.call(this);
	self.x = x;
	self.y = y;
	self.lifetime = 30;
	self.age = 0;
	self.particle = self.attachAsset('particle', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.8,
		scaleY: 0.8
	});
	// Tint with passed color or random neon color
	if (color) {
		self.particle.tint = color;
	} else {
		var colors = [0x7d4dff, 0xb366ff, 0xff65d7, 0xff8fe6, 0x65b3ff];
		self.particle.tint = colors[Math.floor(Math.random() * colors.length)];
	}
	self.velocityX = (Math.random() - 0.5) * 15;
	self.velocityY = (Math.random() - 0.5) * 15 - 8;
	self.update = function () {
		self.age++;
		self.x += self.velocityX;
		self.y += self.velocityY;
		self.velocityY += 0.3; // Gravity effect
		var alpha = 1 - self.age / self.lifetime;
		self.particle.alpha = alpha;
		var scale = 0.8 + (1 - alpha) * 0.5;
		self.particle.scaleX = scale;
		self.particle.scaleY = scale;
		if (self.age >= self.lifetime) {
			self.destroy();
			for (var i = particles.length - 1; i >= 0; i--) {
				if (particles[i] === self) {
					particles.splice(i, 1);
					break;
				}
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x0a0a1a
});

/**** 
* Game Code
****/ 
// Neon-style note shapes with various colors
// Game variables
var notes = [];
var particles = [];
var combo = 0;
var score = 0;
var accuracy = {
	perfect: 0,
	good: 0,
	missed: 0,
	total: 0
};
var gameStarted = false;
var noteSpawnTimer = 0;
var activeTouches = {};
var hitZoneLastAlpha = 0.2;
var selectedSong = 'random';
var gameMode = 'menu'; // 'menu', 'playing'
// Song data
var songs = {
	random: {
		name: "Random Notes",
		bpm: 120,
		spawnRate: 40,
		difficulty: "Easy",
		music: "randomMusic"
	},
	neonBeats: {
		name: "Neon Beats",
		bpm: 140,
		spawnRate: 30,
		difficulty: "Medium",
		music: "neonBeatsMusic",
		notes: [{
			time: 1000,
			lane: 0,
			type: 'regular'
		}, {
			time: 1200,
			lane: 1,
			type: 'regular'
		}, {
			time: 1400,
			lane: 2,
			type: 'hold',
			duration: 60
		}, {
			time: 1600,
			lane: 3,
			type: 'regular'
		}, {
			time: 1800,
			lane: 0,
			type: 'regular'
		}, {
			time: 2000,
			lane: 1,
			type: 'regular'
		}, {
			time: 2200,
			lane: 2,
			type: 'regular'
		}, {
			time: 2400,
			lane: 3,
			type: 'hold',
			duration: 80
		}, {
			time: 2600,
			lane: 0,
			type: 'regular'
		}, {
			time: 2800,
			lane: 1,
			type: 'regular'
		}]
	},
	synthWave: {
		name: "Synth Wave",
		bpm: 160,
		spawnRate: 25,
		difficulty: "Hard",
		music: "synthWaveMusic",
		notes: [{
			time: 500,
			lane: 0,
			type: 'regular'
		}, {
			time: 700,
			lane: 1,
			type: 'regular'
		}, {
			time: 900,
			lane: 2,
			type: 'regular'
		}, {
			time: 1100,
			lane: 3,
			type: 'regular'
		}, {
			time: 1300,
			lane: 0,
			type: 'hold',
			duration: 40
		}, {
			time: 1300,
			lane: 2,
			type: 'hold',
			duration: 40
		}, {
			time: 1500,
			lane: 1,
			type: 'regular'
		}, {
			time: 1700,
			lane: 3,
			type: 'regular'
		}, {
			time: 1900,
			lane: 0,
			type: 'regular'
		}, {
			time: 2100,
			lane: 1,
			type: 'regular'
		}, {
			time: 2300,
			lane: 2,
			type: 'regular'
		}, {
			time: 2500,
			lane: 3,
			type: 'regular'
		}]
	},
	cyberpunk: {
		name: "Cyberpunk City",
		bpm: 180,
		spawnRate: 20,
		difficulty: "Expert",
		music: "cyberpunkMusic",
		notes: [{
			time: 400,
			lane: 0,
			type: 'regular'
		}, {
			time: 600,
			lane: 1,
			type: 'regular'
		}, {
			time: 800,
			lane: 2,
			type: 'regular'
		}, {
			time: 1000,
			lane: 3,
			type: 'regular'
		}, {
			time: 1200,
			lane: 0,
			type: 'hold',
			duration: 30
		}, {
			time: 1200,
			lane: 1,
			type: 'hold',
			duration: 30
		}, {
			time: 1400,
			lane: 2,
			type: 'regular'
		}, {
			time: 1600,
			lane: 3,
			type: 'regular'
		}, {
			time: 1800,
			lane: 0,
			type: 'regular'
		}, {
			time: 2000,
			lane: 1,
			type: 'regular'
		}, {
			time: 2200,
			lane: 2,
			type: 'hold',
			duration: 60
		}, {
			time: 2400,
			lane: 3,
			type: 'regular'
		}]
	}
};
var songStartTime = 0;
var songNoteIndex = 0;
var menuVisible = true;
// Create hit zone with neon glow effect
var hitZone = game.addChild(LK.getAsset('hitZone', {
	anchorX: 0.5,
	anchorY: 0.5
}));
hitZone.x = 2048 / 2;
hitZone.y = 2732 - 300;
hitZone.alpha = 0.2;
// Create lane markers with neon styling
for (var i = 0; i < 4; i++) {
	var laneMarker = game.addChild(LK.getAsset('trail', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleY: 30
	}));
	laneMarker.x = 256 + i * 384;
	laneMarker.y = 2732 / 2;
	laneMarker.alpha = 0.15;
}
// Create 4 clickable squares at the bottom for each lane
var laneButtons = [];
for (var i = 0; i < 4; i++) {
	var laneButton = game.addChild(LK.getAsset('noteRegular' + (i + 1), {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2.0,
		scaleY: 2.0
	}));
	laneButton.x = 256 + i * 384;
	laneButton.y = 2732 - 300; // Position higher up from bottom
	laneButton.alpha = 0.6;
	laneButton.lane = i;
	laneButtons.push(laneButton);
}
// UI Elements with neon colors
var scoreText = new Text2('Score: 0', {
	size: 60,
	fill: 0x9D65FF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
var comboText = new Text2('Combo: 0', {
	size: 50,
	fill: 0xFF65D7
});
comboText.anchor.set(1, 0);
LK.gui.topRight.addChild(comboText);
var accuracyText = new Text2('Accuracy: 100%', {
	size: 40,
	fill: 0x65B3FF
});
accuracyText.anchor.set(0, 0);
LK.gui.topLeft.addChild(accuracyText);
accuracyText.x = 120; // Offset from menu button
// Create song selection menu
var menuContainer = new Container();
game.addChild(menuContainer);
// Menu background
var menuBg = LK.getAsset('hitZone', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 1.0,
	scaleY: 8.0
});
menuBg.x = 2048 / 2;
menuBg.y = 2732 / 2;
menuBg.alpha = 0.8;
menuContainer.addChild(menuBg);
// Menu title
var menuTitle = new Text2('Choose Your Song', {
	size: 80,
	fill: 0xFF65D7
});
menuTitle.anchor.set(0.5, 0.5);
menuTitle.x = 2048 / 2;
menuTitle.y = 800;
menuContainer.addChild(menuTitle);
// Song selection buttons
var songButtons = [];
var songNames = Object.keys(songs);
var buttonSpacing = 300;
var startY = 1200;
for (var i = 0; i < songNames.length; i++) {
	var songKey = songNames[i];
	var song = songs[songKey];
	// Button background
	var buttonBg = LK.getAsset('noteRegular' + (i % 4 + 1), {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 4.0,
		scaleY: 1.5
	});
	buttonBg.x = 2048 / 2;
	buttonBg.y = startY + i * buttonSpacing;
	buttonBg.alpha = 0.7;
	buttonBg.songKey = songKey;
	menuContainer.addChild(buttonBg);
	// Button text
	var buttonText = new Text2(song.name, {
		size: 50,
		fill: 0xFFFFFF
	});
	buttonText.anchor.set(0.5, 0.5);
	buttonText.x = buttonBg.x;
	buttonText.y = buttonBg.y - 20;
	menuContainer.addChild(buttonText);
	// Difficulty and BPM text
	var infoText = new Text2(song.difficulty + ' • ' + song.bpm + ' BPM', {
		size: 30,
		fill: 0x65B3FF
	});
	infoText.anchor.set(0.5, 0.5);
	infoText.x = buttonBg.x;
	infoText.y = buttonBg.y + 30;
	menuContainer.addChild(infoText);
	songButtons.push({
		bg: buttonBg,
		text: buttonText,
		info: infoText,
		songKey: songKey
	});
}
function spawnNote(forcedLane, forcedType, forcedDuration) {
	var lane = forcedLane !== undefined ? forcedLane : Math.floor(Math.random() * 4);
	var noteType = forcedType || (Math.random() < 0.2 ? 'hold' : 'regular');
	var note = new Note(noteType, lane);
	if (forcedDuration && noteType === 'hold') {
		note.maxHoldDuration = forcedDuration;
	}
	notes.push(note);
	game.addChild(note);
}
function updateScore(hitType) {
	var basePoints = 100;
	var multiplier = Math.max(1, Math.floor(combo / 10) + 1);
	if (hitType === 'perfect') {
		score += basePoints * 2 * multiplier;
		accuracy.perfect++;
	} else if (hitType === 'good') {
		score += basePoints * multiplier;
		accuracy.good++;
	}
	accuracy.total++;
	LK.setScore(score);
	scoreText.setText('Score: ' + score);
	comboText.setText('Combo: ' + combo);
	var accuracyPercent = Math.round((accuracy.perfect + accuracy.good) / accuracy.total * 100);
	accuracyText.setText('Accuracy: ' + accuracyPercent + '%');
	// Check for game over condition when accuracy drops below 40%
	if (accuracy.total >= 10 && accuracyPercent < 40) {
		game.setBackgroundColor(0x800080); // Change background to purple
		LK.showGameOver();
	}
}
function createParticleEffect(x, y, color) {
	for (var i = 0; i < 8; i++) {
		var particle = new ParticleEffect(x, y, color);
		particles.push(particle);
		game.addChild(particle);
	}
}
function getLaneFromX(x) {
	if (x < 448) {
		return 0;
	}
	if (x < 832) {
		return 1;
	}
	if (x < 1216) {
		return 2;
	}
	return 3;
}
function startSelectedSong() {
	menuVisible = false;
	menuContainer.visible = false;
	gameMode = 'playing';
	songStartTime = LK.ticks;
	songNoteIndex = 0;
	// Reset game state
	score = 0;
	combo = 0;
	accuracy = {
		perfect: 0,
		good: 0,
		missed: 0,
		total: 0
	};
	// Clear existing notes
	for (var i = notes.length - 1; i >= 0; i--) {
		notes[i].destroy();
		notes.splice(i, 1);
	}
	updateScore('good'); // Updates displays
	LK.setScore(0);
	scoreText.setText('Score: 0');
	comboText.setText('Combo: 0');
	accuracyText.setText('Accuracy: 100%');
	// Play specific music for selected song
	var currentSong = songs[selectedSong];
	if (currentSong.music) {
		LK.playMusic(currentSong.music);
	} else {
		LK.playMusic('bgmusic');
	}
}
function showMenu() {
	menuVisible = true;
	menuContainer.visible = true;
	gameMode = 'menu';
	gameStarted = false;
}
game.down = function (x, y, obj) {
	// Handle menu interactions
	if (menuVisible) {
		for (var i = 0; i < songButtons.length; i++) {
			var button = songButtons[i];
			var buttonBounds = {
				left: button.bg.x - button.bg.width * button.bg.scaleX / 2,
				right: button.bg.x + button.bg.width * button.bg.scaleX / 2,
				top: button.bg.y - button.bg.height * button.bg.scaleY / 2,
				bottom: button.bg.y + button.bg.height * button.bg.scaleY / 2
			};
			if (x >= buttonBounds.left && x <= buttonBounds.right && y >= buttonBounds.top && y <= buttonBounds.bottom) {
				// Button clicked
				selectedSong = button.songKey;
				startSelectedSong();
				return;
			}
		}
		return;
	}
	var lane = getLaneFromX(x);
	var hitZoneY = 2732 - 300;
	var hitFound = false;
	// Add visual feedback to lane button
	if (laneButtons[lane]) {
		laneButtons[lane].alpha = 1.0;
		tween(laneButtons[lane], {
			scaleX: 2.4,
			scaleY: 2.4
		}, {
			duration: 100
		});
	}
	// Find the closest note in this lane
	var closestNote = null;
	var closestDistance = Infinity;
	for (var i = 0; i < notes.length; i++) {
		var note = notes[i];
		if (note.lane === lane && !note.hit && !note.missed) {
			var distance = Math.abs(note.y - hitZoneY);
			if (distance < closestDistance) {
				closestDistance = distance;
				closestNote = note;
			}
		}
	}
	if (closestNote && closestDistance < 100) {
		closestNote.hit = true;
		hitFound = true;
		if (closestNote.type === 'hold') {
			closestNote.holdPressed = true;
			activeTouches[lane] = true;
		}
		// Determine hit accuracy
		var hitType = 'good';
		var noteColor = [0x7d4dff, 0xb366ff, 0xff65d7, 0xff8fe6, 0x65b3ff][closestNote.colorIndex - 1];
		if (closestDistance < 40) {
			hitType = 'perfect';
			combo++;
			LK.getSound('hitPerfect').play();
			createParticleEffect(closestNote.x, closestNote.y, noteColor);
			// Flash screen effect for perfect hits
			LK.effects.flashScreen(noteColor, 200);
		} else {
			combo++;
			LK.getSound('hitGood').play();
			createParticleEffect(closestNote.x, closestNote.y, noteColor);
		}
		updateScore(hitType);
		// Flash hit zone with note color
		tween(hitZone, {
			alpha: 0.6
		}, {
			duration: 100,
			onFinish: function onFinish() {
				tween(hitZone, {
					alpha: 0.2
				}, {
					duration: 300
				});
			}
		});
	}
	if (!hitFound) {
		combo = 0;
		comboText.setText('Combo: 0');
	}
};
game.up = function (x, y, obj) {
	var lane = getLaneFromX(x);
	activeTouches[lane] = false;
	// Reset visual feedback for lane button
	if (laneButtons[lane]) {
		laneButtons[lane].alpha = 0.6;
		tween(laneButtons[lane], {
			scaleX: 2.0,
			scaleY: 2.0
		}, {
			duration: 150
		});
	}
	// Release hold notes in this lane
	for (var i = 0; i < notes.length; i++) {
		var note = notes[i];
		if (note.lane === lane && note.type === 'hold' && note.holdPressed) {
			note.holdPressed = false;
			// Score based on hold duration
			if (note.holdDuration >= note.maxHoldDuration * 0.8) {
				combo++;
				updateScore('perfect');
			} else if (note.holdDuration >= note.maxHoldDuration * 0.5) {
				updateScore('good');
			} else {
				combo = 0;
			}
		}
	}
};
game.update = function () {
	// Handle menu mode
	if (menuVisible) {
		// Add pulsing effect to menu buttons
		for (var i = 0; i < songButtons.length; i++) {
			var button = songButtons[i];
			var pulse = Math.sin(LK.ticks * 0.1 + i * 0.3) * 0.1 + 0.7;
			button.bg.alpha = pulse;
		}
		return;
	}
	// Game started flag
	if (!gameStarted) {
		gameStarted = true;
	}
	// Add pulsing glow effect to hit zone
	var hitZonePulse = Math.sin(LK.ticks * 0.15) * 0.1 + 0.2;
	hitZone.alpha = hitZonePulse;
	// Add subtle pulsing effect to lane buttons
	for (var i = 0; i < laneButtons.length; i++) {
		if (!activeTouches[i]) {
			var buttonPulse = Math.sin(LK.ticks * 0.1 + i * 0.5) * 0.1 + 0.6;
			laneButtons[i].alpha = buttonPulse;
		}
	}
	// Handle song-specific note spawning
	if (selectedSong === 'random') {
		// Spawn notes randomly
		noteSpawnTimer++;
		if (noteSpawnTimer >= 40) {
			spawnNote();
			noteSpawnTimer = 0;
		}
	} else {
		// Spawn notes based on song pattern
		var currentSong = songs[selectedSong];
		if (currentSong.notes && songNoteIndex < currentSong.notes.length) {
			var currentTime = (LK.ticks - songStartTime) * (1000 / 60); // Convert ticks to milliseconds
			var nextNote = currentSong.notes[songNoteIndex];
			if (currentTime >= nextNote.time) {
				spawnNote(nextNote.lane, nextNote.type, nextNote.duration);
				songNoteIndex++;
			}
		}
		// End song when all notes are played and cleared
		if (songNoteIndex >= currentSong.notes.length && notes.length === 0) {
			LK.setTimeout(function () {
				showMenu();
			}, 2000);
		}
	}
	// Clean up off-screen notes
	for (var i = notes.length - 1; i >= 0; i--) {
		var note = notes[i];
		// Remove notes that are off screen or completed
		if (note.y > 2800 || note.hit && note.type === 'regular' || note.hit && note.type === 'hold' && !note.holdPressed && note.holdDuration > 0) {
			note.destroy();
			notes.splice(i, 1);
		}
	}
	// Update hold note states
	for (var lane = 0; lane < 4; lane++) {
		if (!activeTouches[lane]) {
			for (var j = 0; j < notes.length; j++) {
				var note = notes[j];
				if (note.lane === lane && note.type === 'hold' && note.holdPressed) {
					note.holdPressed = false;
				}
			}
		}
	}
	// Add combo glow effect
	if (combo > 10) {
		var comboColors = [0xff65d7, 0x9d65ff, 0x65b3ff, 0xff8fe6];
		var colorIndex = Math.floor(LK.ticks / 10 % comboColors.length);
		comboText.fill = comboColors[colorIndex];
	}
	// End game condition (for demo purposes, end after reaching high score)
	if (score >= 50000) {
		LK.showYouWin();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -149,15 +149,17 @@
 	random: {
 		name: "Random Notes",
 		bpm: 120,
 		spawnRate: 40,
-		difficulty: "Easy"
+		difficulty: "Easy",
+		music: "randomMusic"
 	},
 	neonBeats: {
 		name: "Neon Beats",
 		bpm: 140,
 		spawnRate: 30,
 		difficulty: "Medium",
+		music: "neonBeatsMusic",
 		notes: [{
 			time: 1000,
 			lane: 0,
 			type: 'regular'
@@ -205,8 +207,9 @@
 		name: "Synth Wave",
 		bpm: 160,
 		spawnRate: 25,
 		difficulty: "Hard",
+		music: "synthWaveMusic",
 		notes: [{
 			time: 500,
 			lane: 0,
 			type: 'regular'
@@ -262,8 +265,9 @@
 		name: "Cyberpunk City",
 		bpm: 180,
 		spawnRate: 20,
 		difficulty: "Expert",
+		music: "cyberpunkMusic",
 		notes: [{
 			time: 400,
 			lane: 0,
 			type: 'regular'
@@ -517,8 +521,15 @@
 	LK.setScore(0);
 	scoreText.setText('Score: 0');
 	comboText.setText('Combo: 0');
 	accuracyText.setText('Accuracy: 100%');
+	// Play specific music for selected song
+	var currentSong = songs[selectedSong];
+	if (currentSong.music) {
+		LK.playMusic(currentSong.music);
+	} else {
+		LK.playMusic('bgmusic');
+	}
 }
 function showMenu() {
 	menuVisible = true;
 	menuContainer.visible = true;
@@ -653,11 +664,10 @@
 			button.bg.alpha = pulse;
 		}
 		return;
 	}
-	// Start background music
+	// Game started flag
 	if (!gameStarted) {
-		LK.playMusic('bgmusic');
 		gameStarted = true;
 	}
 	// Add pulsing glow effect to hit zone
 	var hitZonePulse = Math.sin(LK.ticks * 0.15) * 0.1 + 0.2;