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

/**** 
* Classes
****/ 
// Note class
var Note = Container.expand(function () {
	var self = Container.call(this);
	self.direction = 'up'; // will be set after creation
	self.speed = 11; // pixels per frame, reduced for easier play
	self.hit = false;
	self.active = true;
	// Attach asset
	self.noteAsset = null; // will be set after direction is set
	// For hit animation
	self.flashTween = null;
	// Called every tick
	self.update = function () {
		if (!self.active) return;
		var vec = getNoteTravelVec(self.direction);
		self.x += vec.x * self.speed;
		self.y += vec.y * self.speed;
	};
	// Animate on hit
	self.animateHit = function () {
		self.active = false;
		if (self.flashTween) tween.stop(self, {
			alpha: true,
			scaleX: true,
			scaleY: true
		});
		tween(self, {
			alpha: 0,
			scaleX: 1.5,
			scaleY: 1.5
		}, {
			duration: 180,
			easing: tween.cubicOut,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	// Animate on miss
	self.animateMiss = function () {
		self.active = false;
		if (self.flashTween) tween.stop(self, {
			alpha: true,
			scaleX: true,
			scaleY: true
		});
		tween(self, {
			alpha: 0.2
		}, {
			duration: 180,
			easing: tween.cubicOut,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181c20
});

/**** 
* Game Code
****/ 
// Center of play area
// Four note shapes for each direction
// Sounds for hit and miss
// Music (placeholder, actual music asset id will be auto-loaded)
// Note directions
var NOTE_DIRECTIONS = ['up', 'down', 'left', 'right'];
var NOTE_ASSET = {
	up: 'noteUp',
	down: 'noteDown',
	left: 'noteLeft',
	right: 'noteRight'
};
// Note spawn positions (offscreen, moving toward center)
function getNoteSpawnPos(direction) {
	var centerX = 2048 / 2,
		centerY = 2732 / 2;
	var offset = 900; // How far from center to spawn
	if (direction === 'up') return {
		x: centerX,
		y: centerY - offset
	};
	if (direction === 'down') return {
		x: centerX,
		y: centerY + offset
	};
	if (direction === 'left') return {
		x: centerX - offset,
		y: centerY
	};
	if (direction === 'right') return {
		x: centerX + offset,
		y: centerY
	};
	return {
		x: centerX,
		y: centerY
	};
}
// Note travel vector (unit vector toward center)
function getNoteTravelVec(direction) {
	if (direction === 'up') return {
		x: 0,
		y: 1
	};
	if (direction === 'down') return {
		x: 0,
		y: -1
	};
	if (direction === 'left') return {
		x: 1,
		y: 0
	};
	if (direction === 'right') return {
		x: -1,
		y: 0
	};
	return {
		x: 0,
		y: 0
	};
}
var centerX = 2048 / 2,
	centerY = 2732 / 2;
// Add center target
var centerTarget = LK.getAsset('centerTarget', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: centerX,
	y: centerY,
	scaleX: 1,
	scaleY: 1
});
game.addChild(centerTarget);
// Score display
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: '#fff'
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Combo display
var combo = 0;
var comboTxt = new Text2('', {
	size: 70,
	fill: '#ffe082'
});
comboTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(comboTxt);
comboTxt.y = 130;
// Miss feedback
var missTxt = new Text2('', {
	size: 100,
	fill: '#e57373'
});
missTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(missTxt);
// Notes array
var notes = [];
// Timing
var noteInterval = 52; // frames between notes (slower, about 1.15 notes/sec at 60fps)
var noteTimer = 0;
// Game state
var isGameOver = false;
var isYouWin = false;
var maxMisses = 8;
var misses = 0;
var targetScore = 30;
// Face direction detection
function getFaceDirection() {
	// Use noseTip and chin to estimate tilt
	// If facekit is not ready, return null
	if (!facekit.noseTip || !facekit.chin || !facekit.leftEye || !facekit.rightEye) return null;
	var dx = facekit.rightEye.x - facekit.leftEye.x;
	var dy = facekit.rightEye.y - facekit.leftEye.y;
	var angle = Math.atan2(dy, dx) * 180 / Math.PI; // horizontal head tilt
	// Up/down: compare noseTip.y and chin.y to center
	var vertical = facekit.noseTip.y - facekit.chin.y;
	// Left/right: compare noseTip.x to center
	var horizontal = facekit.noseTip.x - centerX;
	// Heuristics: prioritize strong tilts
	if (vertical < -90) return 'up';
	if (vertical > 90) return 'down';
	if (horizontal < -80) return 'left';
	if (horizontal > 80) return 'right';
	// If head is turned, use angle
	if (angle < -25) return 'right';
	if (angle > 25) return 'left';
	return null;
}
// Show combo
function showCombo() {
	if (combo > 1) {
		comboTxt.setText(combo + 'x Combo!');
	} else {
		comboTxt.setText('');
	}
}
// Show miss
function showMiss() {
	missTxt.setText('Miss!');
	tween(missTxt, {
		alpha: 0
	}, {
		duration: 600,
		onFinish: function onFinish() {
			missTxt.setText('');
			missTxt.alpha = 1;
		}
	});
}
// Spawn a note
function spawnNote() {
	var dir = NOTE_DIRECTIONS[Math.floor(Math.random() * 4)];
	var note = new Note();
	note.direction = dir;
	var spawn = getNoteSpawnPos(dir);
	note.x = spawn.x;
	note.y = spawn.y;
	note.noteAsset = note.attachAsset(NOTE_ASSET[dir], {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Rotate asset to point toward center
	if (dir === 'up') note.noteAsset.rotation = 0;
	if (dir === 'down') note.noteAsset.rotation = Math.PI;
	if (dir === 'left') note.noteAsset.rotation = -Math.PI / 2;
	if (dir === 'right') note.noteAsset.rotation = Math.PI / 2;
	notes.push(note);
	game.addChild(note);
}
// Check if note is in hit window (distance to center)
function isNoteHittable(note) {
	var dx = note.x - centerX;
	var dy = note.y - centerY;
	var dist = Math.sqrt(dx * dx + dy * dy);
	return dist < 180; // hit window radius (increased for easier play)
}
// Check if note is missed (passed center)
function isNoteMissed(note) {
	var dx = note.x - centerX;
	var dy = note.y - centerY;
	var dist = Math.sqrt(dx * dx + dy * dy);
	return dist < 20; // too close, missed (decreased for easier play)
}
// Main update loop
game.update = function () {
	if (isGameOver || isYouWin) return;
	// Spawn notes
	noteTimer++;
	if (noteTimer >= noteInterval) {
		spawnNote();
		noteTimer = 0;
	}
	// Get current face direction
	var faceDir = getFaceDirection();
	// For each note: move, check for hit/miss
	for (var i = notes.length - 1; i >= 0; i--) {
		var note = notes[i];
		note.update();
		if (!note.active) {
			notes.splice(i, 1);
			continue;
		}
		// If note is in hit window and faceDir matches, hit!
		if (!note.hit && isNoteHittable(note) && faceDir === note.direction) {
			note.hit = true;
			note.animateHit();
			LK.getSound('hit').play();
			score++;
			combo++;
			showCombo();
			scoreTxt.setText(score);
			if (score >= targetScore) {
				isYouWin = true;
				LK.showYouWin();
				return;
			}
			continue;
		}
		// If note passes center and not hit, miss
		if (!note.hit && isNoteMissed(note)) {
			note.hit = true;
			note.animateMiss();
			LK.getSound('miss').play();
			misses++;
			combo = 0;
			showCombo();
			showMiss();
			if (misses >= maxMisses) {
				isGameOver = true;
				LK.effects.flashScreen(0xff0000, 800);
				LK.showGameOver();
				return;
			}
			continue;
		}
	}
};
// Start music
LK.playMusic('bgmusic', {
	fade: {
		start: 0,
		end: 1,
		duration: 1000
	}
});
// Reset state on game restart
game.on('reset', function () {
	score = 0;
	combo = 0;
	misses = 0;
	isGameOver = false;
	isYouWin = false;
	notes = [];
	scoreTxt.setText('0');
	comboTxt.setText('');
	missTxt.setText('');
	noteTimer = 0;
});
// No touch controls needed; game is face-only
// Make sure all elements are visible and not in top left 100x100
centerTarget.x = centerX;
centerTarget.y = centerY;
scoreTxt.x = LK.gui.top.width / 2;
scoreTxt.y = 10;
comboTxt.x = LK.gui.top.width / 2;
comboTxt.y = 130;
missTxt.x = LK.gui.center.width / 2;
missTxt.y = LK.gui.center.height / 2;

===================================================================
--- original.js
+++ change.js
@@ -10,9 +10,9 @@
 // Note class
 var Note = Container.expand(function () {
 	var self = Container.call(this);
 	self.direction = 'up'; // will be set after creation
-	self.speed = 18; // pixels per frame, can be increased for difficulty
+	self.speed = 11; // pixels per frame, reduced for easier play
 	self.hit = false;
 	self.active = true;
 	// Attach asset
 	self.noteAsset = null; // will be set after direction is set
@@ -75,13 +75,13 @@
 
 /**** 
 * Game Code
 ****/ 
-// Note directions
-// Music (placeholder, actual music asset id will be auto-loaded)
-// Sounds for hit and miss
-// Four note shapes for each direction
 // Center of play area
+// Four note shapes for each direction
+// Sounds for hit and miss
+// Music (placeholder, actual music asset id will be auto-loaded)
+// Note directions
 var NOTE_DIRECTIONS = ['up', 'down', 'left', 'right'];
 var NOTE_ASSET = {
 	up: 'noteUp',
 	down: 'noteDown',
@@ -175,14 +175,14 @@
 LK.gui.center.addChild(missTxt);
 // Notes array
 var notes = [];
 // Timing
-var noteInterval = 38; // frames between notes (about 1.5 notes/sec at 60fps)
+var noteInterval = 52; // frames between notes (slower, about 1.15 notes/sec at 60fps)
 var noteTimer = 0;
 // Game state
 var isGameOver = false;
 var isYouWin = false;
-var maxMisses = 5;
+var maxMisses = 8;
 var misses = 0;
 var targetScore = 30;
 // Face direction detection
 function getFaceDirection() {
@@ -251,16 +251,16 @@
 function isNoteHittable(note) {
 	var dx = note.x - centerX;
 	var dy = note.y - centerY;
 	var dist = Math.sqrt(dx * dx + dy * dy);
-	return dist < 120; // hit window radius
+	return dist < 180; // hit window radius (increased for easier play)
 }
 // Check if note is missed (passed center)
 function isNoteMissed(note) {
 	var dx = note.x - centerX;
 	var dy = note.y - centerY;
 	var dist = Math.sqrt(dx * dx + dy * dy);
-	return dist < 40; // too close, missed
+	return dist < 20; // too close, missed (decreased for easier play)
 }
 // Main update loop
 game.update = function () {
 	if (isGameOver || isYouWin) return;