===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,230 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Target class
+var Target = Container.expand(function () {
+	var self = Container.call(this);
+	var targetAsset = self.attachAsset('target', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.radius = targetAsset.width / 2;
+	self.active = true;
+	self.appearedAt = LK.ticks;
+	self.lifetime = 90; // 1.5 seconds at 60fps
+	// Show tap feedback
+	self.showTapFx = function () {
+		var fx = LK.getAsset('tapfx', {
+			anchorX: 0.5,
+			anchorY: 0.5,
+			x: 0,
+			y: 0,
+			scaleX: 1,
+			scaleY: 1,
+			alpha: 0.7
+		});
+		self.addChild(fx);
+		tween(fx, {
+			scaleX: 1.5,
+			scaleY: 1.5,
+			alpha: 0
+		}, {
+			duration: 250,
+			easing: tween.easeOut,
+			onFinish: function onFinish() {
+				fx.destroy();
+			}
+		});
+	};
+	// Called when target is hit
+	self.hit = function () {
+		if (!self.active) return;
+		self.active = false;
+		self.showTapFx();
+		tween(targetAsset, {
+			alpha: 0
+		}, {
+			duration: 120,
+			onFinish: function onFinish() {
+				self.destroy();
+			}
+		});
+	};
+	// Called when target times out (missed)
+	self.miss = function () {
+		if (!self.active) return;
+		self.active = false;
+		var missFx = LK.getAsset('miss', {
+			anchorX: 0.5,
+			anchorY: 0.5,
+			x: 0,
+			y: 0,
+			alpha: 0.5,
+			scaleX: 1,
+			scaleY: 1
+		});
+		self.addChild(missFx);
+		tween(missFx, {
+			scaleX: 1.5,
+			scaleY: 1.5,
+			alpha: 0
+		}, {
+			duration: 300,
+			onFinish: function onFinish() {
+				missFx.destroy();
+			}
+		});
+		tween(targetAsset, {
+			alpha: 0.2
+		}, {
+			duration: 180,
+			onFinish: function onFinish() {
+				self.destroy();
+			}
+		});
+	};
+	// Per-frame update
+	self.update = function () {
+		if (!self.active) return;
+		if (LK.ticks - self.appearedAt > self.lifetime) {
+			self.miss();
+			// Penalize time for miss
+			timeLeft -= 1.5;
+			if (timeLeft < 0) timeLeft = 0;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x181c22
+});
+
+/**** 
+* Game Code
+****/ 
+// Tap effect: yellow ellipse, 180x180
+// Miss feedback: red ellipse, 180x180
+// Target: green ellipse, 180x180
+// Game state variables
+var score = 0;
+var timeLeft = 20; // seconds
+var target = null;
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: '#fff'
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+var timerTxt = new Text2('20.0', {
+	size: 90,
+	fill: '#fff'
+});
+timerTxt.anchor.set(0.5, 0);
+LK.gui.topRight.addChild(timerTxt);
+// Prevent UI overlap with top left menu (100x100)
+scoreTxt.y = 20;
+timerTxt.y = 20;
+// Spawn a new target at a random position
+function spawnTarget() {
+	if (target && target.active) target.miss();
+	var t = new Target();
+	// Avoid top 200px and bottom 200px for UI and finger comfort
+	var margin = 200;
+	var x = margin + Math.random() * (2048 - 2 * margin);
+	var y = margin + Math.random() * (2732 - 2 * margin);
+	t.x = x;
+	t.y = y;
+	target = t;
+	game.addChild(t);
+}
+// Handle tap/clicks
+game.down = function (x, y, obj) {
+	// Only allow taps if game is running and target is active
+	if (!target || !target.active || timeLeft <= 0) return;
+	// Check if tap is inside target
+	var dx = x - target.x;
+	var dy = y - target.y;
+	if (dx * dx + dy * dy <= target.radius * target.radius) {
+		// Hit!
+		target.hit();
+		score += 1;
+		scoreTxt.setText(score);
+		// Add 1.2s for quick hit, 0.8s for slow
+		var hitTime = (LK.ticks - target.appearedAt) / 60;
+		if (hitTime < 0.7) {
+			timeLeft += 1.2;
+		} else {
+			timeLeft += 0.8;
+		}
+		if (timeLeft > 30) timeLeft = 30; // Cap max time
+		spawnTarget();
+	} else {
+		// Missed tap: penalize
+		timeLeft -= 1.2;
+		if (timeLeft < 0) timeLeft = 0;
+		// Show quick miss feedback at tap
+		var missFx = LK.getAsset('miss', {
+			anchorX: 0.5,
+			anchorY: 0.5,
+			x: x,
+			y: y,
+			alpha: 0.4,
+			scaleX: 1,
+			scaleY: 1
+		});
+		game.addChild(missFx);
+		tween(missFx, {
+			scaleX: 1.5,
+			scaleY: 1.5,
+			alpha: 0
+		}, {
+			duration: 250,
+			onFinish: function onFinish() {
+				missFx.destroy();
+			}
+		});
+	}
+};
+// Main update loop
+game.update = function () {
+	// Update timer
+	if (timeLeft > 0) {
+		timeLeft -= 1 / 60;
+		if (timeLeft < 0) timeLeft = 0;
+	}
+	timerTxt.setText(timeLeft.toFixed(1));
+	// End game if time runs out
+	if (timeLeft <= 0) {
+		if (target && target.active) target.miss();
+		LK.setScore(score);
+		LK.showGameOver();
+		return;
+	}
+	// Spawn first target if needed
+	if (!target || !target.active) {
+		spawnTarget();
+	}
+};
+// Reset game state on restart
+game.on('reset', function () {
+	score = 0;
+	timeLeft = 20;
+	scoreTxt.setText(score);
+	timerTxt.setText(timeLeft.toFixed(1));
+	if (target) {
+		target.destroy();
+		target = null;
+	}
+});
+/**** 
+* End of file
+****/ 
\ No newline at end of file