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

/**** 
* Classes
****/ 
// Note class: creates a note at a random (x, y) position
var Note = Container.expand(function () {
	var self = Container.call(this);
	var hitZone = self.attachAsset('hit', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.6,
		scaleY: 1.6
	});
	hitZone.alpha = 0.4;
	// Add hitAccuracy ring, starts much further out
	var hitAccuracy = self.attachAsset('hit', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2.5,
		scaleY: 2.5
	});
	hitAccuracy.alpha = 0.25;
	// Animate hitAccuracy ring moving toward hitZone
	var hitAccuracyTargetScale = 1.6;
	var hitAccuracyStartScale = 3.4;
	hitAccuracy.scaleX = hitAccuracyStartScale;
	hitAccuracy.scaleY = hitAccuracyStartScale;
	// Use tween plugin for smooth animation, duration is now linearly dependent on speed only
	tween(hitAccuracy, {
		scaleX: hitAccuracyTargetScale,
		scaleY: hitAccuracyTargetScale
	}, {
		duration: 1000 / speed
	});
	var noteAsset = self.attachAsset('note', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var margin = 100;
	self.x = margin + Math.random() * (2048 - 2 * margin);
	self.y = margin + Math.random() * (2732 - 2 * margin);
	// Timing windows in ms (example values, tune as needed)
	var MARVELOUS_WINDOW = 30;
	var PERFECT_WINDOW = 70;
	var GOOD_WINDOW = 120;
	var BAD_WINDOW = 180;
	var FAIL_WINDOW = 250;
	// Store the time when the note is created and when the hit zone is reached
	self.spawnTime = Date.now();
	self.hitZoneTime = self.spawnTime + 1000 / speed; // duration of tween
	// Helper to show feedback (could be improved with particles, etc)
	function showFeedback(result) {
		var color = 0xffffff;
		if (result === "marvelous") color = 0x00fffc;else if (result === "perfect") color = 0x00ff00;else if (result === "good") color = 0xffff00;else if (result === "bad") color = 0xffa500;else if (result === "fail") color = 0xff0000;
		var feedback = new Text2(result.toUpperCase(), {
			size: 120,
			fill: "#" + ("000000" + color.toString(16)).slice(-6)
		});
		feedback.anchor.set(0.5, 0.5);
		feedback.x = self.x;
		feedback.y = self.y - 180;
		game.addChild(feedback);
		tween(feedback, {
			alpha: 0,
			y: feedback.y - 100
		}, {
			duration: 500
		});
		LK.setTimeout(function () {
			feedback.destroy();
		}, 500);
	}
	self.down = function (x, y, obj) {
		var now = Date.now();
		var msDiff = now - self.hitZoneTime;
		var absMs = Math.abs(msDiff);
		var result = "fail";
		if (absMs <= MARVELOUS_WINDOW) result = "marvelous";else if (absMs <= PERFECT_WINDOW) result = "perfect";else if (absMs <= GOOD_WINDOW) result = "good";else if (absMs <= BAD_WINDOW) result = "bad";else if (absMs <= FAIL_WINDOW) result = "fail";
		// If hit is way too early (before hitAccuracy is close), also fail
		if (now < self.spawnTime + 0.2 * (self.hitZoneTime - self.spawnTime)) result = "fail";
		showFeedback(result);
		self.destroy();
		note = new Note();
		game.addChild(note);
	};
	// Miss detection: if player doesn't tap in time, auto-fail
	self.update = function () {
		var now = Date.now();
		if (now - self.hitZoneTime > FAIL_WINDOW) {
			showFeedback("fail");
			self.destroy();
			note = new Note();
			game.addChild(note);
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
var ms;
var speed = 1;
var note;
/*
* Initializations
*/
note = new Note();
game.addChild(note);

===================================================================
--- original.js
+++ change.js
@@ -42,13 +42,62 @@
 	});
 	var margin = 100;
 	self.x = margin + Math.random() * (2048 - 2 * margin);
 	self.y = margin + Math.random() * (2732 - 2 * margin);
+	// Timing windows in ms (example values, tune as needed)
+	var MARVELOUS_WINDOW = 30;
+	var PERFECT_WINDOW = 70;
+	var GOOD_WINDOW = 120;
+	var BAD_WINDOW = 180;
+	var FAIL_WINDOW = 250;
+	// Store the time when the note is created and when the hit zone is reached
+	self.spawnTime = Date.now();
+	self.hitZoneTime = self.spawnTime + 1000 / speed; // duration of tween
+	// Helper to show feedback (could be improved with particles, etc)
+	function showFeedback(result) {
+		var color = 0xffffff;
+		if (result === "marvelous") color = 0x00fffc;else if (result === "perfect") color = 0x00ff00;else if (result === "good") color = 0xffff00;else if (result === "bad") color = 0xffa500;else if (result === "fail") color = 0xff0000;
+		var feedback = new Text2(result.toUpperCase(), {
+			size: 120,
+			fill: "#" + ("000000" + color.toString(16)).slice(-6)
+		});
+		feedback.anchor.set(0.5, 0.5);
+		feedback.x = self.x;
+		feedback.y = self.y - 180;
+		game.addChild(feedback);
+		tween(feedback, {
+			alpha: 0,
+			y: feedback.y - 100
+		}, {
+			duration: 500
+		});
+		LK.setTimeout(function () {
+			feedback.destroy();
+		}, 500);
+	}
 	self.down = function (x, y, obj) {
+		var now = Date.now();
+		var msDiff = now - self.hitZoneTime;
+		var absMs = Math.abs(msDiff);
+		var result = "fail";
+		if (absMs <= MARVELOUS_WINDOW) result = "marvelous";else if (absMs <= PERFECT_WINDOW) result = "perfect";else if (absMs <= GOOD_WINDOW) result = "good";else if (absMs <= BAD_WINDOW) result = "bad";else if (absMs <= FAIL_WINDOW) result = "fail";
+		// If hit is way too early (before hitAccuracy is close), also fail
+		if (now < self.spawnTime + 0.2 * (self.hitZoneTime - self.spawnTime)) result = "fail";
+		showFeedback(result);
 		self.destroy();
 		note = new Note();
 		game.addChild(note);
 	};
+	// Miss detection: if player doesn't tap in time, auto-fail
+	self.update = function () {
+		var now = Date.now();
+		if (now - self.hitZoneTime > FAIL_WINDOW) {
+			showFeedback("fail");
+			self.destroy();
+			note = new Note();
+			game.addChild(note);
+		}
+	};
 	return self;
 });
 
 /****