===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,261 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Note = Container.expand(function (trackIndex, isPowerNote) {
+	var self = Container.call(this);
+	self.trackIndex = trackIndex;
+	self.isPowerNote = isPowerNote || false;
+	self.speed = 8;
+	self.hasBeenTapped = false;
+	self.lastY = 0;
+	var noteGraphics = self.attachAsset(self.isPowerNote ? 'powerNote' : 'note', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	if (self.isPowerNote) {
+		noteGraphics.tint = 0xFFD93D;
+		self.scale.set(1.2);
+	}
+	self.update = function () {
+		self.lastY = self.y;
+		self.y += self.speed;
+	};
+	self.checkTiming = function () {
+		var targetY = targetZones[self.trackIndex].y;
+		var distance = Math.abs(self.y - targetY);
+		if (distance <= 30) {
+			return 'perfect';
+		} else if (distance <= 60) {
+			return 'good';
+		}
+		return 'miss';
+	};
+	return self;
+});
+var TargetZone = Container.expand(function (trackIndex) {
+	var self = Container.call(this);
+	self.trackIndex = trackIndex;
+	var zoneGraphics = self.attachAsset('targetZone', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	zoneGraphics.alpha = 0.3;
+	self.flash = function () {
+		zoneGraphics.alpha = 0.8;
+		tween(zoneGraphics, {
+			alpha: 0.3
+		}, {
+			duration: 200
+		});
+	};
+	return self;
+});
+var Track = Container.expand(function (trackIndex) {
+	var self = Container.call(this);
+	self.trackIndex = trackIndex;
+	var trackGraphics = self.attachAsset('track', {
+		anchorX: 0.5,
+		anchorY: 0
+	});
+	trackGraphics.alpha = 0.1;
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x1a1a2e
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var notes = [];
+var tracks = [];
+var targetZones = [];
+var numTracks = 4;
+var trackWidth = 200;
+var gameWidth = 2048;
+var score = 0;
+var combo = 0;
+var maxCombo = 0;
+var missedNotes = 0;
+var maxMissedNotes = 5;
+var noteSpawnTimer = 0;
+var noteSpawnInterval = 45;
+var gameSpeed = 1;
+var difficultyTimer = 0;
+// UI elements
+var scoreTxt = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+var comboTxt = new Text2('Combo: 0', {
+	size: 50,
+	fill: 0xFFD93D
+});
+comboTxt.anchor.set(0, 0);
+comboTxt.x = 50;
+comboTxt.y = 100;
+LK.gui.topLeft.addChild(comboTxt);
+var missedTxt = new Text2('Missed: 0/5', {
+	size: 40,
+	fill: 0xFF6B6B
+});
+missedTxt.anchor.set(1, 0);
+LK.gui.topRight.addChild(missedTxt);
+// Initialize tracks and target zones
+var startX = (gameWidth - numTracks * trackWidth) / 2 + trackWidth / 2;
+for (var i = 0; i < numTracks; i++) {
+	var track = new Track(i);
+	track.x = startX + i * trackWidth;
+	track.y = 0;
+	tracks.push(track);
+	game.addChild(track);
+	var targetZone = new TargetZone(i);
+	targetZone.x = startX + i * trackWidth;
+	targetZone.y = 2500;
+	targetZones.push(targetZone);
+	game.addChild(targetZone);
+}
+// Helper functions
+function spawnNote() {
+	var trackIndex = Math.floor(Math.random() * numTracks);
+	var isPowerNote = Math.random() < 0.1;
+	var note = new Note(trackIndex, isPowerNote);
+	note.x = startX + trackIndex * trackWidth;
+	note.y = -50;
+	note.speed = 8 * gameSpeed;
+	notes.push(note);
+	game.addChild(note);
+}
+function updateScore(points) {
+	score += points * Math.max(1, Math.floor(combo / 5));
+	scoreTxt.setText('Score: ' + score);
+	LK.setScore(score);
+}
+function updateCombo(increase) {
+	if (increase) {
+		combo++;
+		maxCombo = Math.max(maxCombo, combo);
+	} else {
+		combo = 0;
+	}
+	comboTxt.setText('Combo: ' + combo);
+}
+function updateMissed() {
+	missedNotes++;
+	missedTxt.setText('Missed: ' + missedNotes + '/' + maxMissedNotes);
+	if (missedNotes >= maxMissedNotes) {
+		LK.showGameOver();
+	}
+}
+function showPerfectEffect(x, y) {
+	var effect = LK.getAsset('perfectEffect', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	effect.x = x;
+	effect.y = y;
+	effect.alpha = 0.8;
+	game.addChild(effect);
+	tween(effect, {
+		alpha: 0,
+		scaleX: 2,
+		scaleY: 2
+	}, {
+		duration: 300,
+		onFinish: function onFinish() {
+			effect.destroy();
+		}
+	});
+}
+function checkNoteInTrack(trackIndex) {
+	for (var i = 0; i < notes.length; i++) {
+		var note = notes[i];
+		if (note.trackIndex === trackIndex && !note.hasBeenTapped) {
+			var timing = note.checkTiming();
+			if (timing !== 'miss') {
+				note.hasBeenTapped = true;
+				var points = 0;
+				if (timing === 'perfect') {
+					points = note.isPowerNote ? 200 : 100;
+					LK.getSound('perfect').play();
+					showPerfectEffect(note.x, note.y);
+				} else if (timing === 'good') {
+					points = note.isPowerNote ? 100 : 50;
+					LK.getSound('tap').play();
+				}
+				updateScore(points);
+				updateCombo(true);
+				targetZones[trackIndex].flash();
+				note.destroy();
+				notes.splice(i, 1);
+				return true;
+			}
+		}
+	}
+	return false;
+}
+// Touch handlers
+game.down = function (x, y, obj) {
+	for (var i = 0; i < numTracks; i++) {
+		var trackX = startX + i * trackWidth;
+		if (x >= trackX - trackWidth / 2 && x <= trackX + trackWidth / 2) {
+			if (!checkNoteInTrack(i)) {
+				updateCombo(false);
+				LK.getSound('miss').play();
+			}
+			break;
+		}
+	}
+};
+// Main game loop
+game.update = function () {
+	// Spawn notes
+	noteSpawnTimer++;
+	if (noteSpawnTimer >= noteSpawnInterval) {
+		spawnNote();
+		noteSpawnTimer = 0;
+	}
+	// Update difficulty
+	difficultyTimer++;
+	if (difficultyTimer >= 1800) {
+		// Every 30 seconds
+		gameSpeed += 0.2;
+		noteSpawnInterval = Math.max(20, noteSpawnInterval - 2);
+		difficultyTimer = 0;
+	}
+	// Update notes
+	for (var i = notes.length - 1; i >= 0; i--) {
+		var note = notes[i];
+		// Check if note missed target zone
+		if (!note.hasBeenTapped && note.lastY <= 2600 && note.y > 2600) {
+			updateCombo(false);
+			updateMissed();
+			note.destroy();
+			notes.splice(i, 1);
+			continue;
+		}
+		// Remove notes that are off screen
+		if (note.y > 2800) {
+			note.destroy();
+			notes.splice(i, 1);
+		}
+	}
+	// Win condition
+	if (score >= 10000) {
+		LK.showYouWin();
+	}
+};
+// Start background music
+LK.playMusic('bgmusic');
\ No newline at end of file