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

/**** 
* Classes
****/ 
// Light (note) class
var Light = Container.expand(function () {
	var self = Container.call(this);
	// Properties to be set on creation:
	// self.direction: 'up' | 'down' | 'left' | 'right'
	// self.color: 'red' | 'blue' | 'green' | 'yellow'
	// self.speed: px per tick
	// self.targetX, self.targetY: where to move toward
	// Attach note type-specific asset as the light symbol
	// Always use the correct asset for the note type, matching noteTypes array
	var noteAssetId;
	if (self.noteAsset) {
		noteAssetId = self.noteAsset;
	} else {
		// Fallback: find asset from noteTypes array by name
		noteAssetId = "note_quarter";
		for (var i = 0; i < noteTypes.length; ++i) {
			if (noteTypes[i].name === self.noteType) {
				noteAssetId = noteTypes[i].asset;
				break;
			}
		}
	}
	var light = self.attachAsset(noteAssetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For hit detection
	self.radius = light.width * 0.5;
	// For animation
	self.active = true; // If false, ignore update
	// Called every tick
	self.update = function () {
		if (!self.active) return;
		// Move towards center of white circle (never stop at target, just keep moving in that direction)
		var dx = centerX - self.x;
		var dy = centerY - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist === 0) dist = 0.0001; // avoid division by zero
		self.x += self.speed * dx / dist;
		self.y += self.speed * dy / dist;
		// Lights never stop moving, so do not clamp or halt at target
		// --- Add glowing effect: pulse scale and alpha ---
		var pulse = 0.15 * Math.sin(LK.ticks * 0.25 + self.x + self.y) + 1.0;
		self.scaleX = pulse;
		self.scaleY = pulse;
		self.alpha = 0.85 + 0.15 * Math.sin(LK.ticks * 0.5 + self.x);
		// --- Add rotation effect ---
		// Slowed down rotation for a smoother effect
		self.rotation += 0.045; // rotate slower for a more pleasant effect
	};
	// Animate and destroy on hit/miss
	self.hit = function (_onFinish) {
		self.active = false;
		// Flash the light with a white overlay before animating out
		LK.effects.flashObject(self, 0xffffff, 120);
		tween(self, {
			scaleX: 1.5,
			scaleY: 1.5,
			alpha: 0
		}, {
			duration: 200,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				self.destroy();
				if (_onFinish) _onFinish();
			}
		});
	};
	return self;
});
// StepLadderBar: Asymmetric, playful step-only ladder (no rails), using a step asset
var StepLadderBar = Container.expand(function () {
	var self = Container.call(this);
	self.stepCount = 30; // 30 steps
	self.notes = [];
	self.stepPositions = [];
	// Step asset: must be in asset library as 'ladderStep'
	var stepAsset = LK.getAsset('ladderStep', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var stepW = stepAsset.width;
	var stepH = stepAsset.height;
	var ladderHeight = 2732 - 320; // leave 160px margin top/bottom
	var startY = 2732 - 160 - stepH / 2;
	var endY = 160 + stepH / 2;
	var stepSpacing = (startY - endY) / (self.stepCount - 1);
	var centerX = 2048 / 2;
	// Asymmetry parameters
	var maxOffset = 520; // much larger horizontal offset from center for more dramatic zig-zag
	for (var i = 0; i < self.stepCount; ++i) {
		var y = startY - i * stepSpacing;
		// Alternate left/right, but with more organic, non-uniform pattern
		var direction = i % 2 === 0 ? 1 : -1;
		// Stronger sine wave for zig-zag, plus a secondary wave for more organic feel
		var zigzag = Math.sin(i * Math.PI / 5.2) * maxOffset * 0.85 + Math.sin(i * Math.PI / 2.7) * maxOffset * 0.25;
		// Larger, more varied jitter for playful irregularity
		var jitter = (Math.random() - 0.5) * 120 + Math.sin(i * 1.7) * 30;
		// Occasionally flip direction for extra asymmetry
		if (i % 7 === 0) direction *= -1;
		var x = centerX + direction * (maxOffset * 0.6) + zigzag + jitter;
		self.stepPositions.push({
			x: x,
			y: y
		});
		// Draw step (horizontal bar)
		var step = self.attachAsset('ladderStep', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: x,
			y: y,
			scaleX: 1.0,
			scaleY: 1.0,
			alpha: 1.0
		});
	}
	// Add a note to the next available step, animating it in
	self.addNote = function (color) {
		var idx = self.notes.length;
		if (idx >= self.stepCount) return; // No more steps
		var pos = self.stepPositions[idx];
		// Use note type-specific asset for step ladder bar notes
		// Find the noteType from the last hit light (if available)
		var noteType = 'quarter';
		if (lights.length > 0 && lights[0].lastHitNoteType) {
			noteType = lights[0].lastHitNoteType;
		} else if (typeof self.lastAddedNoteType === "string") {
			noteType = self.lastAddedNoteType;
		}
		// Always use the correct asset for the note type, matching noteTypes array
		var noteAssetId;
		if (lights.length > 0 && lights[0].noteAsset) {
			noteAssetId = lights[0].noteAsset;
		} else {
			noteAssetId = "note_quarter";
			for (var i = 0; i < noteTypes.length; ++i) {
				if (noteTypes[i].name === noteType) {
					noteAssetId = noteTypes[i].asset;
					break;
				}
			}
		}
		var note = self.attachAsset(noteAssetId, {
			anchorX: 0.5,
			anchorY: 0.5,
			x: pos.x,
			y: pos.y,
			scaleX: 1.0,
			scaleY: 1.0,
			tint: color === 'red' ? 0xff4b4b : color === 'blue' ? 0x4bafff : color === 'green' ? 0x4bff4b : color === 'yellow' ? 0xffe14b : 0xffffff,
			alpha: 0.0
		});
		self.notes.push(note);
		// Animate in: fade and pop
		tween(note, {
			alpha: 1,
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 180,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(note, {
					scaleX: 1.0,
					scaleY: 1.0
				}, {
					duration: 120,
					easing: tween.easeIn
				});
			}
		});
	};
	return self;
});
// Animated falling treble clefs background
var TrebleClefBackground = Container.expand(function () {
	var self = Container.call(this);
	self.clefs = [];
	self.spawnInterval = 60; // spawn every 60 ticks (1s)
	self.lastSpawnTick = 0;
	self.maxClefs = 10;
	// Precompute asset size
	var clefAsset = LK.getAsset('trebleClefStaff', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var clefW = clefAsset.width;
	var clefH = clefAsset.height;
	// Spawn a new clef at random X
	self.spawnClef = function () {
		if (self.clefs.length >= self.maxClefs) return;
		var x = 100 + Math.random() * (2048 - 200);
		var y = -clefH / 2 - Math.random() * 200;
		var speed = 2.5 + Math.random() * 2.5;
		var alpha = 0.18 + Math.random() * 0.12;
		var scale = 0.7 + Math.random() * 0.5;
		var rot = (Math.random() - 0.5) * 0.2;
		var clef = self.attachAsset('trebleClefStaff', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: x,
			y: y,
			scaleX: scale,
			scaleY: scale,
			alpha: alpha,
			rotation: rot
		});
		clef._vy = speed;
		clef._vr = (Math.random() - 0.5) * 0.01;
		self.clefs.push(clef);
	};
	self.update = function () {
		// Spawn new clefs at interval
		if (LK.ticks - self.lastSpawnTick > self.spawnInterval) {
			self.spawnClef();
			self.lastSpawnTick = LK.ticks;
		}
		// Animate all clefs
		for (var i = self.clefs.length - 1; i >= 0; --i) {
			var clef = self.clefs[i];
			clef.y += clef._vy;
			clef.rotation += clef._vr;
			// Fade in/out at top/bottom
			if (clef.y < 200) {
				clef.alpha = Math.min(0.3, 0.12 + (clef.y + clef.height / 2) / 400);
			} else if (clef.y > 2732 - 200) {
				clef.alpha = Math.max(0, 0.3 - (clef.y - (2732 - 200)) / 400);
			}
			// Remove if out of screen
			if (clef.y - clef.height / 2 > 2732 + 40) {
				self.removeChild(clef);
				self.clefs.splice(i, 1);
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181818
});

/**** 
* Game Code
****/ 
// Harp sounds
// Oboe sounds
// Guitar sounds
// Drum sounds
// Piano sounds
// Zayıf zil sesi (right)
// Güçlü zil sesi (left)
// Soft davul sesi (down)
// Tok davul sesi (up)
// Sound assets for each direction
// Quarter-circle arcs (using ellipse, but will be visually quartered by anchor/position)
// LK.init.music('bgmusic', {volume: 0.5});
// Music (background, optional, not played in MVP)
// Sound effects for each direction
// Four colored "light" shapes for incoming notes
// Four quarter arcs (quarter circles) for directions: up, down, left, right
// --- Layout constants ---
// Drum and cymbal sounds for arc taps
// Up (red) - main drum
// Down (blue) - high-pitched drum
// Left (green) - low cymbal
// Right (yellow) - high cymbal
// Arc and UI shapes
// Ladder and clef images
// --- Note shape assets for all note types (for easy editing) ---
// birlik
// ikilik
// dörtlük
// sekizlik
// onaltılık
// otuzikilik
// altmışdörtlük
// Music and sounds
var centerX = 2048 / 2;
var centerY = 2732 / 2;
var centerRadius = 200; // centerCircle radius
// --- Animated falling treble clefs background ---
var trebleClefBg = new TrebleClefBackground();
trebleClefBg.x = 0;
trebleClefBg.y = 0;
game.addChild(trebleClefBg);
// --- Step ladder bar: starts at bottom, fills screen vertically ---
var stepLadderBar = new StepLadderBar();
stepLadderBar.x = 0;
stepLadderBar.y = 0;
game.addChild(stepLadderBar);
// Arc positions (relative to center)
// We want the inner edge of each arc to touch the center circle (radius = 200)
// Each arc is 300x300, so the distance from center to arc center = centerRadius + arcW/2 = 200 + 150 = 350
var arcDistance = 200 + 150; // 350
var arcOffset = arcDistance; // alias for compatibility with spawn/target logic
var arcW = 300,
	arcH = 300; // all arcs are quarter circles, so 300x300
// --- Create main elements ---
// Center circle
var centerCircle = LK.getAsset('centerCircle', {
	anchorX: 0.5,
	anchorY: 0.5
});
centerCircle.x = centerX;
centerCircle.y = centerY;
game.addChild(centerCircle);
// Quarter arcs - D-pad style, all arcs directly adjacent to center circle
// Up arc: above center, touching at bottom
var arcUp = LK.getAsset('arcUp', {
	anchorX: 0.5,
	// center horizontally
	anchorY: 1.0 // bottom
});
arcUp.x = centerX;
arcUp.y = centerY - centerRadius;
game.addChild(arcUp);
// Down arc: below center, touching at top
var arcDown = LK.getAsset('arcDown', {
	anchorX: 0.5,
	// center horizontally
	anchorY: 0.0 // top
});
arcDown.x = centerX;
arcDown.y = centerY + centerRadius;
game.addChild(arcDown);
// Left arc: left of center, touching at right
var arcLeft = LK.getAsset('arcLeft', {
	anchorX: 1.0,
	// right
	anchorY: 0.5 // center vertically
});
arcLeft.x = centerX - centerRadius;
arcLeft.y = centerY;
game.addChild(arcLeft);
// Right arc: right of center, touching at left
var arcRight = LK.getAsset('arcRight', {
	anchorX: 0.0,
	// left
	anchorY: 0.5 // center vertically
});
arcRight.x = centerX + centerRadius;
arcRight.y = centerY;
game.addChild(arcRight);
// --- Arc hitboxes for input detection ---
var arcHitboxes = [{
	dir: 'up',
	x: centerX,
	y: centerY - centerRadius - arcH / 2,
	w: arcW,
	h: arcH,
	color: 'red',
	asset: arcUp
}, {
	dir: 'down',
	x: centerX,
	y: centerY + centerRadius + arcH / 2,
	w: arcW,
	h: arcH,
	color: 'blue',
	asset: arcDown
}, {
	dir: 'left',
	x: centerX - centerRadius - arcW / 2,
	y: centerY,
	w: arcW,
	h: arcH,
	color: 'green',
	asset: arcLeft
}, {
	dir: 'right',
	x: centerX + centerRadius + arcW / 2,
	y: centerY,
	w: arcW,
	h: arcH,
	color: 'yellow',
	asset: arcRight
}];
// --- Score, lives and wave display ---
var score = 0;
var highScore = storage.highScore || 0;
// Lives system removed: no lives variable, no display
var level = 1;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var highScoreTxt = new Text2('High: ' + highScore, {
	size: 60,
	fill: 0xFFD700
});
// Anchor to left (0), top (0)
highScoreTxt.anchor.set(0, 0);
// Place at (x=110, y=20) to avoid top left menu and keep visible
highScoreTxt.x = 110;
highScoreTxt.y = 20;
LK.gui.top.addChild(highScoreTxt);
var levelTxt = new Text2('Level 1', {
	size: 90,
	fill: 0xFFD700
});
levelTxt.anchor.set(0.5, 0);
levelTxt.y = 110; // place below score
LK.gui.top.addChild(levelTxt);
// Lives display (top right, away from menu)
// --- Light management ---
var lights = [];
// No lightActive flag needed; allow multiple lights at once
// --- Color mapping for directions ---
var dirColor = {
	'up': 'red',
	'down': 'blue',
	'left': 'green',
	'right': 'yellow'
};
// All available instrument sounds for random selection
var allInstrumentSounds = ['piano1', 'piano2', 'piano3', 'piano4', 'drum1', 'drum2', 'drum3', 'drum4', 'guitar1', 'guitar2', 'guitar3', 'guitar4', 'oboe1', 'oboe2', 'oboe3', 'oboe4', 'harp1', 'harp2', 'harp3', 'harp4'];
// Function to get random instrument sound
function getRandomInstrumentSound() {
	var randomIndex = Math.floor(Math.random() * allInstrumentSounds.length);
	return allInstrumentSounds[randomIndex];
}
var dirBg = {
	'up': 0xff4b4b,
	'down': 0x4bafff,
	'left': 0x4bff4b,
	'right': 0xffe14b
};
// --- Light spawn positions (offscreen, towards arcs) ---
function getLightSpawn(dir) {
	var dist = 700; // distance from center
	if (dir === 'up') return {
		x: centerX,
		y: centerY - arcOffset - dist
	};
	if (dir === 'down') return {
		x: centerX,
		y: centerY + arcOffset + dist
	};
	if (dir === 'left') return {
		x: centerX - arcOffset - dist,
		y: centerY
	};
	if (dir === 'right') return {
		x: centerX + arcOffset + dist,
		y: centerY
	};
	return {
		x: centerX,
		y: centerY
	};
}
function getLightTarget(dir) {
	if (dir === 'up') return {
		x: centerX,
		y: centerY - arcOffset
	};
	if (dir === 'down') return {
		x: centerX,
		y: centerY + arcOffset
	};
	if (dir === 'left') return {
		x: centerX - arcOffset,
		y: centerY
	};
	if (dir === 'right') return {
		x: centerX + arcOffset,
		y: centerY
	};
	return {
		x: centerX,
		y: centerY
	};
}
// --- Note types and their musical properties ---
// Each note type uses its own asset, speed, and point value as described:
// - note_whole: slowest, 1 point
// - note_half: 10% faster than whole, 2 points
// - note_quarter: 10% faster than half, 4 points
// - note_eighth: 10% faster than quarter, 8 points
// - note_sixteenth: 10% faster than eighth, 16 points
var noteTypes = [{
	name: "whole",
	asset: "note_whole",
	speed: 1.0,
	points: 1,
	weight: 1
}, {
	name: "half",
	asset: "note_half",
	speed: 1.1,
	// 10% faster than whole
	points: 2,
	weight: 1
}, {
	name: "quarter",
	asset: "note_quarter",
	speed: 1.1 * 1.1,
	// 10% faster than half
	points: 4,
	weight: 1
}, {
	name: "eighth",
	asset: "note_eighth",
	speed: 1.1 * 1.1 * 1.1,
	// 10% faster than quarter
	points: 8,
	weight: 1
}, {
	name: "sixteenth",
	asset: "note_sixteenth",
	speed: 1.1 * 1.1 * 1.1 * 1.1,
	// 10% faster than eighth
	points: 16,
	weight: 1
}];
// note_whole, note_half, note_quarter ve note_eighth kullanılacak
// Precompute weighted note type array for random selection
var weightedNoteTypes = [];
for (var i = 0; i < noteTypes.length; ++i) {
	for (var j = 0; j < noteTypes[i].weight; ++j) {
		weightedNoteTypes.push(noteTypes[i]);
	}
}
// note_whole, note_half, note_quarter ve note_eighth eklendi
// --- Level and Light speed: base speed for whole note, others are multiples ---
var level = 1;
var currentMusic = 'beat'; // Track current playing music
function getMusicForLevel(level) {
	if (level >= 4) return 'beat4';
	if (level >= 3) return 'beat3';
	if (level >= 2) return 'beat2';
	return 'beat';
}
function getLevelForScore(score) {
	// Level 1: 0-49, Level 2: 50-149, Level 3: 150-299, Level 4: 300-499, Level 5: 500-749, etc.
	// Each new level every +150 points after 50
	if (score < 50) return 1;
	return 2 + Math.floor((score - 50) / 100);
}
function getLightSpeedForNoteType(noteType) {
	// Use the new speed property from noteTypes
	var base = 1.2;
	var currentLevel = getLevelForScore(score);
	// Level 2: +120%, Level 3: +200% (multiplicative), then +50% for each further level
	if (currentLevel === 2) {
		base *= 2.2;
	} else if (currentLevel === 3) {
		base *= 2.2 * 3.0;
	} else if (currentLevel > 3) {
		base *= 2.2 * 3.0;
		for (var i = 4; i <= currentLevel; ++i) {
			base *= 1.5;
		}
	}
	// noteType can be either a noteType object or a {name: ...} object
	var speedMultiplier = noteType.speed !== undefined ? noteType.speed : 1.0;
	return base * speedMultiplier;
}
// --- Spawn a light (note) with note type ---
function spawnLight(dir) {
	var color = dirColor[dir];
	var spawn = getLightSpawn(dir);
	var target = getLightTarget(dir);
	// note_whole veya note_half rastgele seçilecek
	var noteType = weightedNoteTypes[Math.floor(Math.random() * weightedNoteTypes.length)];
	var light = new Light();
	light.noteType = noteType.name;
	light.noteAsset = noteType.asset;
	light.notePoints = noteType.points;
	light.direction = dir;
	light.color = color;
	light.x = spawn.x;
	light.y = spawn.y;
	light.targetX = target.x;
	light.targetY = target.y;
	light.speed = getLightSpeedForNoteType(noteType);
	// Asset düzeltmesi: ilgili nota için özel asset kullan
	if (light.children && light.children.length > 0) {
		for (var i = light.children.length - 1; i >= 0; --i) {
			light.removeChild(light.children[i]);
		}
	}
	var noteAssetObj = light.attachAsset(noteType.asset, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	light.radius = noteAssetObj.width * 0.5;
	lights.push(light);
	game.addChild(light);
	// No lightActive flag or logic needed
}
// --- Continuous light spawning logic ---
// Timers for continuous spawning
var lightSpawnTimer = null;
var showInfoTimer = null;
var dirs = ['up', 'down', 'left', 'right'];
function clearLightTimers() {
	if (lightSpawnTimer !== null) {
		LK.clearTimeout(lightSpawnTimer);
		lightSpawnTimer = null;
	}
	if (showInfoTimer !== null) {
		LK.clearTimeout(showInfoTimer);
		showInfoTimer = null;
	}
}
// Main continuous light spawning function
function startLightSpawning() {
	clearLightTimers();
	// Always spawn at random intervals, but ensure at least 2 seconds between spawns
	var baseInterval, randomRange, minInterval;
	if (score < 20) {
		baseInterval = 320;
		randomRange = 260;
		minInterval = 2000;
	} else {
		// After score 20, make spawn intervals more irregular and sometimes much faster
		baseInterval = 80 + Math.floor(Math.random() * 120); // base between 80-200ms
		randomRange = 400 + Math.floor(Math.random() * 200); // random up to 600ms
		minInterval = 1200 + Math.floor(Math.random() * 600); // min interval 1200-1800ms
	}
	// Spawn a light
	var dir = dirs[Math.floor(Math.random() * 4)];
	spawnLight(dir);
	// Schedule next light
	var nextInterval = baseInterval;
	if (randomRange > 0) {
		nextInterval += Math.floor(Math.random() * randomRange);
	}
	// Enforce minimum interval of 1 second (1000ms)
	if (nextInterval < minInterval) {
		nextInterval = minInterval;
	}
	lightSpawnTimer = LK.setTimeout(function () {
		startLightSpawning();
	}, nextInterval);
}
// Call this to (re)start spawning after all lights cleared
function startWave() {
	startLightSpawning();
}
// --- Handle tap input ---
function getDirectionFromPoint(x, y) {
	// Returns 'up', 'down', 'left', 'right' or null
	for (var i = 0; i < arcHitboxes.length; ++i) {
		var arc = arcHitboxes[i];
		// Use bounding box for MVP
		var dx = x - arc.x;
		var dy = y - arc.y;
		if (arc.dir === 'up' || arc.dir === 'down') {
			if (Math.abs(dx) < arc.w / 2 && Math.abs(dy) < arc.h / 2) return arc.dir;
		} else {
			if (Math.abs(dx) < arc.w / 2 && Math.abs(dy) < arc.h / 2) return arc.dir;
		}
	}
	return null;
}
// --- Handle tap (down) ---
game.down = function (x, y, obj) {
	// Use the provided x, y directly as they are already in game coordinates
	var dir = getDirectionFromPoint(x, y);
	if (!dir) return;
	// Always play a random instrument sound on tap, even if no light is present
	var soundPlayed = false;
	var randomSound = getRandomInstrumentSound();
	LK.getSound(randomSound).play();
	soundPlayed = true;
	// --- Beat vibration/tween effect for arc images (hoparlör titreşim) ---
	var arcObj = null;
	if (dir === 'up') arcObj = arcUp;else if (dir === 'down') arcObj = arcDown;else if (dir === 'left') arcObj = arcLeft;else if (dir === 'right') arcObj = arcRight;
	if (arcObj) {
		// Stop any previous tweens on this arc
		tween.stop(arcObj, {
			scaleX: true,
			scaleY: true
		});
		// Animate: quick scale up and back (beat effect)
		var origScaleX = arcObj.scaleX !== undefined ? arcObj.scaleX : 1;
		var origScaleY = arcObj.scaleY !== undefined ? arcObj.scaleY : 1;
		tween(arcObj, {
			scaleX: origScaleX * 1.18,
			scaleY: origScaleY * 1.18
		}, {
			duration: 60,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(arcObj, {
					scaleX: origScaleX,
					scaleY: origScaleY
				}, {
					duration: 90,
					easing: tween.easeIn
				});
			}
		});
	}
	// Find the closest active light matching direction and close enough
	for (var i = 0; i < lights.length; ++i) {
		var light = lights[i];
		if (!light.active) continue;
		// If direction matches and light is close enough to arc
		var target = getLightTarget(dir);
		var dx = light.x - target.x;
		var dy = light.y - target.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		// Only allow tap if light has entered arc zone and has NOT reached centerCircle
		var dxCenter = light.x - centerX;
		var dyCenter = light.y - centerY;
		var distCenter = Math.sqrt(dxCenter * dxCenter + dyCenter * dyCenter);
		if (light.direction === dir && light.enteredArc === true && distCenter > centerRadius) {
			// Correct!
			// Animate note to step ladder bar instead of destroying
			light.active = false;
			var startX = light.x;
			var startY = light.y;
			var idx = stepLadderBar.notes.length;
			var endX = stepLadderBar.x + 190;
			var endY = stepLadderBar.y + (stepLadderBar.stepYs && stepLadderBar.stepYs[idx] !== undefined ? stepLadderBar.stepYs[idx] : 30 + idx * 90);
			// Track last hit note type for correct asset on step ladder bar
			stepLadderBar.lastAddedNoteType = light.noteType;
			light.lastHitNoteType = light.noteType;
			tween(light, {
				x: endX,
				y: endY,
				scaleX: 1.1,
				scaleY: 1.1,
				alpha: 1
			}, {
				duration: 340,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					// Remove from array and destroy light
					for (var j = 0; j < lights.length; ++j) {
						if (lights[j] === light) {
							lights.splice(j, 1);
							break;
						}
					}
					light.destroy();
					// Add a note to the step ladder bar
					stepLadderBar.addNote(light.color);
				}
			});
			// Her nota tipi kendi değeri kadar puan kazandırır
			var noteScoreTable = {
				whole: 1,
				half: 2,
				quarter: 4,
				eighth: 8,
				sixteenth: 16
			};
			// note_whole 1 puan, note_half 2 puan
			score += noteScoreTable[light.noteType] || 1;
			scoreTxt.setText(score);
			// Update high score if needed
			if (score > highScore) {
				highScore = score;
				storage.highScore = highScore;
				highScoreTxt.setText('High: ' + highScore);
			}
			// Update level if needed
			var newLevel = getLevelForScore(score);
			if (newLevel !== level) {
				level = newLevel;
				levelTxt.setText('Level ' + level);
				// Switch music for new level
				var newMusic = getMusicForLevel(level);
				if (newMusic !== currentMusic) {
					currentMusic = newMusic;
					LK.playMusic(currentMusic);
				}
			}
			// Win condition removed: game continues, level and speed will keep increasing as score grows
			// Play sound
			// (Already played above, do not play again)
			// Flash background
			tween.stop(game, {
				backgroundColor: true
			});
			var oldBg = game.backgroundColor;
			// If blue arc (down) light is tapped, set background to blue and keep it
			if (dir === 'down') {
				game.setBackgroundColor(0x4bafff);
			} else if (dir === 'left') {
				// If green arc (left) light is tapped, set background to green and keep it
				game.setBackgroundColor(0x4bff4b);
			} else if (dir === 'right') {
				// If yellow arc (right) light is tapped, set background to yellow and keep it
				game.setBackgroundColor(0xffe14b);
			} else if (dir === 'up') {
				// If red arc (up) light is tapped, set background to red and keep it
				game.setBackgroundColor(0xff4b4b);
			} else {
				tween(game, {
					backgroundColor: dirBg[dir]
				}, {
					duration: 120,
					onFinish: function onFinish() {
						tween(game, {
							backgroundColor: oldBg
						}, {
							duration: 400
						});
					}
				});
			}
			// No need to spawn next light here; continuous spawn is always active
			return;
		}
	}
	// If tap is on arc but no light is close: miss
	// Flash red for feedback, but do not decrement lives or end game
	LK.effects.flashScreen(0xff0000, 500);
};
// --- Update loop: check for missed lights ---
game.update = function () {
	// Animate falling treble clefs background
	if (typeof trebleClefBg !== "undefined" && trebleClefBg.update) {
		trebleClefBg.update();
	}
	for (var i = lights.length - 1; i >= 0; --i) {
		var light = lights[i];
		if (!light.active) continue;
		// Calculate distance to arc (where tap is allowed to start)
		var arcTarget = getLightTarget(light.direction);
		var dxArc = light.x - arcTarget.x;
		var dyArc = light.y - arcTarget.y;
		var distArc = Math.sqrt(dxArc * dxArc + dyArc * dyArc);
		// Calculate distance to centerCircle (where tap is no longer allowed, and game over if reached)
		var dxCenter = light.x - centerX;
		var dyCenter = light.y - centerY;
		var distCenter = Math.sqrt(dxCenter * dxCenter + dyCenter * dyCenter);
		// Track if light has entered the arc zone (first contact)
		if (light.enteredArc === undefined) {
			// If light is outside arc zone, not yet entered
			light.enteredArc = false;
		}
		// If not yet entered arc, check if it just entered
		if (!light.enteredArc && light.lastDistArc !== undefined && light.lastDistArc >= 120 && distArc < 120) {
			light.enteredArc = true;
		}
		light.lastDistArc = distArc;
		// If light has entered arc, but now reached centerCircle: game over immediately
		if (light.enteredArc && distCenter < centerRadius) {
			light.hit(function () {
				for (var j = 0; j < lights.length; ++j) {
					if (lights[j] === light) {
						lights.splice(j, 1);
						break;
					}
				}
				// Flash red and trigger game over immediately
				LK.effects.flashScreen(0xff0000, 500);
				LK.showGameOver();
			});
			continue;
		}
	}
	// No batch logic needed; continuous spawn is always active
};
// --- Start game ---
score = 0;
level = 1;
scoreTxt.setText(score);
highScore = storage.highScore || 0;
if (typeof highScoreTxt !== "undefined") {
	highScoreTxt.setText('High: ' + highScore);
}
if (typeof levelTxt !== "undefined") {
	levelTxt.setText('Level 1');
}
// Play background beat music (loops by default)
LK.playMusic('beat');
LK.setTimeout(function () {
	startWave();
}, 600);
;
;

===================================================================
--- original.js
+++ change.js
@@ -255,8 +255,13 @@
 
 /**** 
 * Game Code
 ****/ 
+// Harp sounds
+// Oboe sounds
+// Guitar sounds
+// Drum sounds
+// Piano sounds
 // Zayıf zil sesi (right)
 // Güçlü zil sesi (left)
 // Soft davul sesi (down)
 // Tok davul sesi (up)
@@ -422,14 +427,15 @@
 	'down': 'blue',
 	'left': 'green',
 	'right': 'yellow'
 };
-var dirSound = {
-	'up': 'drumRed',
-	'down': 'drumBlue',
-	'left': 'drumGreen',
-	'right': 'drumYellow'
-};
+// All available instrument sounds for random selection
+var allInstrumentSounds = ['piano1', 'piano2', 'piano3', 'piano4', 'drum1', 'drum2', 'drum3', 'drum4', 'guitar1', 'guitar2', 'guitar3', 'guitar4', 'oboe1', 'oboe2', 'oboe3', 'oboe4', 'harp1', 'harp2', 'harp3', 'harp4'];
+// Function to get random instrument sound
+function getRandomInstrumentSound() {
+	var randomIndex = Math.floor(Math.random() * allInstrumentSounds.length);
+	return allInstrumentSounds[randomIndex];
+}
 var dirBg = {
 	'up': 0xff4b4b,
 	'down': 0x4bafff,
 	'left': 0x4bff4b,
@@ -669,11 +675,12 @@
 game.down = function (x, y, obj) {
 	// Use the provided x, y directly as they are already in game coordinates
 	var dir = getDirectionFromPoint(x, y);
 	if (!dir) return;
-	// Always play the arc's sound on tap, even if no light is present
+	// Always play a random instrument sound on tap, even if no light is present
 	var soundPlayed = false;
-	LK.getSound(dirSound[dir]).play();
+	var randomSound = getRandomInstrumentSound();
+	LK.getSound(randomSound).play();
 	soundPlayed = true;
 	// --- Beat vibration/tween effect for arc images (hoparlör titreşim) ---
 	var arcObj = null;
 	if (dir === 'up') arcObj = arcUp;else if (dir === 'down') arcObj = arcDown;else if (dir === 'left') arcObj = arcLeft;else if (dir === 'right') arcObj = arcRight;