===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,247 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Particle = Container.expand(function (startX, startY) {
+	var self = Container.call(this);
+	var particleGraphics = self.attachAsset('particle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.x = startX;
+	self.y = startY;
+	self.velocityX = (Math.random() - 0.5) * 10;
+	self.velocityY = (Math.random() - 0.5) * 10 - 5;
+	self.life = 1.0;
+	self.update = function () {
+		self.x += self.velocityX;
+		self.y += self.velocityY;
+		self.velocityY += 0.5; // gravity
+		self.life -= 0.03;
+		self.alpha = self.life;
+		if (self.life <= 0) {
+			self.destroy();
+			particles.splice(particles.indexOf(self), 1);
+		}
+	};
+	return self;
+});
+var Tile = Container.expand(function (column, color) {
+	var self = Container.call(this);
+	var assetName = 'tile_' + color;
+	var tileGraphics = self.attachAsset(assetName, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.column = column;
+	self.color = color;
+	self.speed = tileSpeed;
+	self.hasBeenHit = false;
+	self.lastY = 0;
+	self.update = function () {
+		self.lastY = self.y;
+		self.y += self.speed;
+	};
+	self.hit = function () {
+		if (self.hasBeenHit) return false;
+		self.hasBeenHit = true;
+		// Play sound based on column
+		var sounds = ['note_c', 'note_d', 'note_e', 'note_f'];
+		LK.getSound(sounds[self.column]).play();
+		// Visual feedback
+		LK.effects.flashObject(self, 0xffffff, 300);
+		tween(self, {
+			alpha: 0,
+			scaleX: 1.2,
+			scaleY: 1.2
+		}, {
+			duration: 300,
+			onFinish: function onFinish() {
+				self.destroy();
+			}
+		});
+		// Create particles
+		createParticles(self.x, self.y);
+		return true;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x111111
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var columns = [];
+var tiles = [];
+var particles = [];
+var columnWidth = 450;
+var columnSpacing = 62;
+var tileSpeed = 4;
+var spawnRate = 120;
+var ticksSinceLastSpawn = 0;
+var combo = 0;
+var speedIncreaseInterval = 10;
+var hitCount = 0;
+var strikeZoneY = 2732 - 250;
+// Create column backgrounds and strike zones
+for (var i = 0; i < 4; i++) {
+	var columnX = 250 + i * (columnWidth + columnSpacing);
+	// Column background
+	var columnBg = game.attachAsset('column_bg', {
+		anchorX: 0.5,
+		anchorY: 0,
+		x: columnX,
+		y: 0
+	});
+	// Strike zone
+	var strikeZone = game.attachAsset('strike_zone', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		x: columnX,
+		y: strikeZoneY,
+		alpha: 0.3
+	});
+	columns.push({
+		x: columnX,
+		strikeZone: strikeZone
+	});
+}
+// UI Elements
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+var comboTxt = new Text2('', {
+	size: 80,
+	fill: 0xFFFF00
+});
+comboTxt.anchor.set(0.5, 0);
+comboTxt.y = 150;
+LK.gui.top.addChild(comboTxt);
+// Functions
+function spawnTile() {
+	var columnIndex = Math.floor(Math.random() * 4);
+	var colors = ['red', 'blue', 'green', 'yellow'];
+	var color = colors[Math.floor(Math.random() * colors.length)];
+	var tile = new Tile(columnIndex, color);
+	tile.x = columns[columnIndex].x;
+	tile.y = -75;
+	tiles.push(tile);
+	game.addChild(tile);
+}
+function createParticles(x, y) {
+	for (var i = 0; i < 8; i++) {
+		var particle = new Particle(x, y);
+		particles.push(particle);
+		game.addChild(particle);
+	}
+}
+function checkTileHit(x, y) {
+	var hitTile = null;
+	var minDistance = Infinity;
+	for (var i = 0; i < tiles.length; i++) {
+		var tile = tiles[i];
+		if (tile.hasBeenHit) continue;
+		// Check if click is in tile's column
+		var columnX = columns[tile.column].x;
+		if (Math.abs(x - columnX) < columnWidth / 2) {
+			// Check if tile is in strike zone
+			if (tile.y >= strikeZoneY - 100 && tile.y <= strikeZoneY + 100) {
+				var distance = Math.abs(tile.y - strikeZoneY);
+				if (distance < minDistance) {
+					minDistance = distance;
+					hitTile = tile;
+				}
+			}
+		}
+	}
+	return hitTile;
+}
+function gameOver() {
+	LK.getSound('miss').play();
+	LK.effects.flashScreen(0xff0000, 1000);
+	LK.showGameOver();
+}
+function updateScore() {
+	scoreTxt.setText(LK.getScore());
+	if (combo > 1) {
+		comboTxt.setText('COMBO x' + combo);
+		comboTxt.alpha = 1;
+	} else {
+		comboTxt.alpha = 0;
+	}
+}
+// Game events
+game.down = function (x, y, obj) {
+	var hitTile = checkTileHit(x, y);
+	if (hitTile) {
+		if (hitTile.hit()) {
+			hitCount++;
+			combo++;
+			// Score based on combo
+			var points = combo >= 5 ? 5 : combo;
+			LK.setScore(LK.getScore() + points);
+			// Speed increase every 10 hits
+			if (hitCount % speedIncreaseInterval === 0) {
+				tileSpeed += 0.5;
+				spawnRate = Math.max(60, spawnRate - 5);
+			}
+			// Remove tile from array
+			var index = tiles.indexOf(hitTile);
+			if (index > -1) {
+				tiles.splice(index, 1);
+			}
+			updateScore();
+		}
+	} else {
+		// Missed - game over
+		combo = 0;
+		gameOver();
+	}
+};
+// Main game loop
+game.update = function () {
+	// Spawn tiles
+	ticksSinceLastSpawn++;
+	if (ticksSinceLastSpawn >= spawnRate) {
+		spawnTile();
+		ticksSinceLastSpawn = 0;
+	}
+	// Update tiles
+	for (var i = tiles.length - 1; i >= 0; i--) {
+		var tile = tiles[i];
+		// Check if tile passed strike zone without being hit
+		if (!tile.hasBeenHit && tile.lastY < strikeZoneY + 150 && tile.y >= strikeZoneY + 150) {
+			combo = 0;
+			gameOver();
+			return;
+		}
+		// Remove tiles that are off screen
+		if (tile.y > 2800) {
+			if (!tile.hasBeenHit) {
+				tile.destroy();
+				tiles.splice(i, 1);
+			}
+		}
+	}
+	// Update particles
+	for (var i = particles.length - 1; i >= 0; i--) {
+		var particle = particles[i];
+		if (particle.life <= 0) {
+			particles.splice(i, 1);
+		}
+	}
+};
\ No newline at end of file