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

/**** 
* Classes
****/ 
var BackgroundParticle = Container.expand(function () {
	var self = Container.call(this);
	self.particleGraphics = null;
	self.baseSpeed = 0;
	self.initialScale = 1;
	self.baseAlpha = 0.1;
	self._startTwinkleAnimation = function () {
		tween.stop(self, {
			alpha: true
		});
		var currentAlpha = self.alpha;
		var pulseDelta = self.baseAlpha * 0.4;
		var targetMinAlpha = Math.max(0.05, self.baseAlpha - pulseDelta);
		var targetMaxAlpha = Math.min(1.0, self.baseAlpha + pulseDelta);
		if (targetMaxAlpha - targetMinAlpha < 0.05) {
			if (self.baseAlpha < 0.15) {
				targetMaxAlpha = Math.min(1.0, self.baseAlpha + 0.1);
			} else if (self.baseAlpha > 0.85) {
				targetMinAlpha = Math.max(0.05, self.baseAlpha - 0.1);
			}
			if (targetMaxAlpha - targetMinAlpha < 0.05) {
				return;
			}
		}
		var nextTargetAlpha;
		if (self.alpha === self.baseAlpha || Math.abs(currentAlpha - targetMaxAlpha) < Math.abs(currentAlpha - targetMinAlpha)) {
			nextTargetAlpha = targetMinAlpha;
		} else {
			nextTargetAlpha = targetMaxAlpha;
		}
		var pulseDuration = 300 + Math.random() * 400;
		tween(self, {
			alpha: nextTargetAlpha
		}, {
			duration: pulseDuration,
			easing: tween.easeInOut,
			onFinish: function onFinish() {
				if (self && self._startTwinkleAnimation) {
					self._startTwinkleAnimation();
				}
			}
		});
	};
	self.init = function () {
		tween.stop(self, {
			alpha: true
		});
		var scale = 0.312 + Math.random() * 1.248;
		self.initialScale = scale;
		self.scale.set(scale);
		var colors = [0xff00ff, 0x00ffff, 0xffff00, 0xff0000, 0x00ff00, 0x0000ff, 0xffa500, 0xda70d6];
		var color = colors[Math.floor(Math.random() * colors.length)];
		if (self.particleGraphics) {
			self.particleGraphics.destroy();
		}
		self.particleGraphics = self.attachAsset('starParticle', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		self.particleGraphics.tint = color;
		self.baseSpeed = (0.5 + Math.random() * 1.5) * scale;
		// Distribute particles evenly across the screen
		self.x = Math.random() * GAME_WIDTH;
		self.y = Math.random() * GAME_HEIGHT; // Start particles throughout the screen
		self.baseAlpha = 0.1 + Math.random() * 0.7;
		self.alpha = self.baseAlpha;
		self._startTwinkleAnimation();
	};
	self.updateParticle = function () {
		// Get current direction (smoothly interpolated if changing)
		var currentDirection = getCurrentParticleDirection();
		// Calculate total speed (base * game speed * countdown acceleration)
		var totalSpeed = self.baseSpeed * baseParticleSpeed * (isCountdownActive ? countdownAcceleration : 1);
		// Move in the current direction - simple linear movement
		self.x += currentDirection.x * totalSpeed;
		self.y += currentDirection.y * totalSpeed;
		// Reset particle if it goes off screen - improved logic
		var margin = 100;
		if (self.x < -margin || self.x > GAME_WIDTH + margin || self.y < -margin || self.y > GAME_HEIGHT + margin) {
			// Respawn from the opposite side based on movement direction
			// and distribute evenly across that edge
			if (Math.abs(currentDirection.x) > Math.abs(currentDirection.y)) {
				// Primarily horizontal movement
				if (currentDirection.x > 0) {
					// Moving right, spawn from left edge
					self.x = -margin + Math.random() * 50;
					self.y = Math.random() * GAME_HEIGHT;
				} else {
					// Moving left, spawn from right edge
					self.x = GAME_WIDTH + margin - Math.random() * 50;
					self.y = Math.random() * GAME_HEIGHT;
				}
			} else {
				// Primarily vertical movement
				if (currentDirection.y > 0) {
					// Moving down, spawn from top edge
					self.x = Math.random() * GAME_WIDTH;
					self.y = -margin + Math.random() * 50;
				} else {
					// Moving up, spawn from bottom edge
					self.x = Math.random() * GAME_WIDTH;
					self.y = GAME_HEIGHT + margin - Math.random() * 50;
				}
			}
		}
	};
	self.init();
	return self;
});
var Note = Container.expand(function (noteData, spawnTime) {
	var self = Container.call(this);
	self.noteData = noteData;
	self.type = noteData.type;
	self.targetX = noteData.x;
	self.targetY = noteData.y;
	self.hitTime = noteData.time;
	self.duration = noteData.duration || 0;
	self.spawnTime = spawnTime;
	self.zone = noteData.x < GAME_WIDTH / 2 ? 'left' : 'right';
	if (noteData.color && noteData.color === SYNC_NOTE_COLOR) {
		if (self.type === 'tap') {
			self.color = COLOR_SYNC_TAP;
		} else if (self.type === 'hold') {
			self.color = COLOR_SYNC_HOLD;
		} else {
			self.color = self.zone === 'left' ? COLOR_LEFT_ZONE : COLOR_RIGHT_ZONE;
		}
	} else {
		self.color = self.zone === 'left' ? COLOR_LEFT_ZONE : COLOR_RIGHT_ZONE;
	}
	self.active = true;
	self.isHit = false;
	self.isMissed = false;
	self.isSpawning = true;
	self.isHolding = false;
	self.holdSuccessfullyCompleted = false;
	self.holdParticles = [];
	self.lastParticleEmissionTime = 0;
	self.PARTICLE_EMISSION_INTERVAL = 50;
	self.holdStarted = false;
	self.beatPulseInterval = null;
	var assetName = self.type === 'hold' ? 'holdNoteCore' : 'noteCore';
	self.noteGraphics = self.attachAsset(assetName, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.noteGraphics.tint = self.color;
	self._startBeatPulseAnimation = function () {
		if (!self || !self.active || self.isHit || self.isMissed || self.isSpawning) {
			tween.stop(self, {
				scaleX: true,
				scaleY: true
			});
			return;
		}
		tween.stop(self, {
			scaleX: true,
			scaleY: true
		});
		tween(self, {
			scaleX: 1.15,
			scaleY: 1.15
		}, {
			duration: BEAT_DURATION_MS * 0.2,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				if (self && self.active && !self.isHit && !self.isMissed && !self.isSpawning) {
					tween(self, {
						scaleX: 1.0,
						scaleY: 1.0
					}, {
						duration: BEAT_DURATION_MS * 0.2,
						easing: tween.easeIn
					});
				}
			}
		});
	};
	self._clearBeatPulseLoop = function () {
		if (self.beatPulseInterval) {
			LK.clearInterval(self.beatPulseInterval);
			self.beatPulseInterval = null;
		}
		tween.stop(self, {
			scaleX: true,
			scaleY: true
		});
	};
	self._initiateBeatPulseLoop = function () {
		self._clearBeatPulseLoop();
		if (self && self.active && !self.isHit && !self.isMissed && !self.isSpawning) {
			self._startBeatPulseAnimation();
			self.beatPulseInterval = LK.setInterval(function () {
				if (self && self.active && !self.isHit && !self.isMissed && !self.isSpawning) {
					self._startBeatPulseAnimation();
				} else {
					self._clearBeatPulseLoop();
				}
			}, BEAT_DURATION_MS);
		}
	};
	self.x = self.targetX;
	self.y = self.targetY;
	self.alpha = 0;
	self.scaleX = 0.1;
	self.scaleY = 0.1;
	self.createHoldTrail = function () {
		var cycleTime = self.hitTime % SCANNER_CYCLE_DURATION;
		var scannerMovingUp = cycleTime < SCANNER_HALF_CYCLE;
		var direction = scannerMovingUp ? -1 : 1;
		var originalRequestedDuration = self.duration;
		var maxPossibleTrailPixelLength = originalRequestedDuration / SCANNER_HALF_CYCLE * PLAY_AREA_HEIGHT;
		var actualTrailPixelLength = maxPossibleTrailPixelLength;
		if (direction === -1) {
			if (self.y - actualTrailPixelLength < SCANNER_Y_MIN) {
				actualTrailPixelLength = self.y - SCANNER_Y_MIN;
			}
		} else {
			if (self.y + actualTrailPixelLength > SCANNER_Y_MAX) {
				actualTrailPixelLength = SCANNER_Y_MAX - self.y;
			}
		}
		actualTrailPixelLength = Math.max(0, actualTrailPixelLength);
		if (actualTrailPixelLength < maxPossibleTrailPixelLength) {
			if (PLAY_AREA_HEIGHT > 0 && SCANNER_HALF_CYCLE > 0) {
				self.duration = actualTrailPixelLength / PLAY_AREA_HEIGHT * SCANNER_HALF_CYCLE;
			} else if (actualTrailPixelLength === 0) {
				self.duration = 0;
			}
		}
		self.duration = Math.max(0, self.duration);
		// Create trail line first so it's below everything else
		var trailLine = self.attachAsset('holdTrail', {
			anchorX: 0.5,
			anchorY: 0
		});
		trailLine.tint = self.color;
		trailLine.alpha = 0.6;
		trailLine.height = actualTrailPixelLength;
		if (direction === -1) {
			trailLine.y = -actualTrailPixelLength;
		} else {
			trailLine.y = 0;
		}
		self.holdTrails.push(trailLine);
		// Move the trail to index 0 so it's below the note graphics
		self.setChildIndex(trailLine, 0);
		self.endNote = self.attachAsset('noteCore', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		self.endNote.tint = self.color;
		self.endNote.alpha = 0.8;
		self.endNote.scaleX = 0.7;
		self.endNote.scaleY = 0.7;
		self.endNote.y = actualTrailPixelLength * direction;
		self.endGlow = self.attachAsset('glowRing', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		self.endGlow.tint = self.color;
		self.endGlow.alpha = 0.3;
		self.endGlow.scaleX = 0.5;
		self.endGlow.scaleY = 0.5;
		self.endGlow.y = actualTrailPixelLength * direction;
	};
	self.holdTrails = [];
	if (self.type === 'hold' && self.duration > 0) {
		self.createHoldTrail();
	}
	self.spawnIn = function () {
		self.isSpawning = true;
		tween(self, {
			alpha: 1,
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 500,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				self.isSpawning = false;
				self._initiateBeatPulseLoop();
			}
		});
	};
	self.showHitEffect = function () {
		self._clearBeatPulseLoop();
		LK.getSound('hitSound').play();
		self.explodeIntoParticles();
		tween(self, {
			scaleX: 1.5,
			scaleY: 1.5,
			alpha: 0
		}, {
			duration: 200,
			onFinish: function onFinish() {
				self.active = false;
				self._clearBeatPulseLoop();
			}
		});
	};
	self.startHoldEffect = function () {
		self._clearBeatPulseLoop();
		LK.getSound('hitSound').play();
		tween(self.noteGraphics, {
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 100,
			onFinish: function onFinish() {
				tween(self.noteGraphics, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 100
				});
			}
		});
	};
	self.showMissEffect = function () {
		self._clearBeatPulseLoop();
		LK.getSound('missSound').play();
		tween(self.noteGraphics, {
			tint: 0xff0000
		}, {
			duration: 150,
			onFinish: function onFinish() {
				tween(self, {
					alpha: 0.3
				}, {
					duration: 300,
					onFinish: function onFinish() {
						self.active = false;
						self._clearBeatPulseLoop();
					}
				});
			}
		});
	};
	self.explodeIntoParticles = function () {
		var noteScale = 1.2; // Base scale relative to noteCore (300px)
		// Stage 1: Initial Flash (0-200ms)
		var flash = game.attachAsset('supernovaFlash', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		flash.tint = 0xFFFFFF;
		flash.x = self.x;
		flash.y = self.y;
		flash.alpha = 0;
		flash.scale.set(0.1 * noteScale);
		tween(flash, {
			alpha: 1,
			scaleX: 2.8 * noteScale,
			scaleY: 2.8 * noteScale
		}, {
			duration: 400,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(flash, {
					alpha: 0
				}, {
					duration: 350,
					onFinish: function onFinish() {
						if (flash && flash.destroy) {
							flash.destroy();
						}
					}
				});
			}
		});
		// Stage 2: Shockwave (100-600ms)
		LK.setTimeout(function () {
			var shockwave = game.attachAsset('supernovaShockwave', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			shockwave.tint = 0x00FFFF;
			shockwave.x = self.x;
			shockwave.y = self.y;
			shockwave.alpha = 1;
			shockwave.scale.set(0.2 * noteScale);
			tween(shockwave, {
				scaleX: 5.0 * noteScale,
				scaleY: 5.0 * noteScale,
				alpha: 0
			}, {
				duration: 800,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					if (shockwave && shockwave.destroy) {
						shockwave.destroy();
					}
				}
			});
		}, 100);
		// Stage 3: Core Particles (50-800ms)
		var coreParticleCount = 15;
		for (var i = 0; i < coreParticleCount; i++) {
			(function (index) {
				LK.setTimeout(function () {
					var coreAsset = Math.random() < 0.5 ? 'supernovaCoreParticle' : 'supernovaCoreParticle2';
					var particle = game.attachAsset(coreAsset, {
						anchorX: 0.5,
						anchorY: 0.5
					});
					particle.tint = Math.random() < 0.5 ? 0xFFFFFF : 0xFFFF88;
					particle.x = self.x;
					particle.y = self.y;
					var angle = index / coreParticleCount * Math.PI * 2 + (Math.random() - 0.5) * 0.5;
					var speed = 200 + Math.random() * 150;
					var targetX = self.x + Math.cos(angle) * speed;
					var targetY = self.y + Math.sin(angle) * speed;
					var finalScale = (0.5 + Math.random() * 0.4) * noteScale;
					particle.scale.set(0.2 * noteScale);
					tween(particle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: finalScale,
						scaleY: finalScale
					}, {
						duration: 900,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
						}
					});
				}, 50 + Math.random() * 100);
			})(i);
		}
		// Stage 4: Nebula Trails (200-1200ms)
		var nebulaCount = 20;
		for (var j = 0; j < nebulaCount; j++) {
			(function (index) {
				LK.setTimeout(function () {
					var nebulaAssets = ['supernovaNebulaTrail', 'supernovaNebulaTrail2', 'supernovaNebulaTrail3'];
					var nebulaAsset = nebulaAssets[Math.floor(Math.random() * nebulaAssets.length)];
					var particle = game.attachAsset(nebulaAsset, {
						anchorX: 0.5,
						anchorY: 0.5
					});
					var colors = [0x8844FF, 0xFF44AA, 0x4488FF, 0xAA44FF];
					particle.tint = colors[Math.floor(Math.random() * colors.length)];
					particle.x = self.x + (Math.random() - 0.5) * 40;
					particle.y = self.y + (Math.random() - 0.5) * 40;
					particle.alpha = 0.8 + Math.random() * 0.3;
					var angle = Math.random() * Math.PI * 2;
					var speed = 80 + Math.random() * 120;
					var targetX = self.x + Math.cos(angle) * speed;
					var targetY = self.y + Math.sin(angle) * speed;
					var finalScale = (0.4 + Math.random() * 0.3) * noteScale;
					particle.scale.set(0.2 * noteScale);
					tween(particle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: finalScale,
						scaleY: finalScale,
						rotation: Math.random() * Math.PI * 2
					}, {
						duration: 1300,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
						}
					});
				}, 200 + Math.random() * 200);
			})(j);
		}
		// Stage 5: Stellar Debris (150-1000ms)
		var debrisCount = 12;
		for (var k = 0; k < debrisCount; k++) {
			(function (index) {
				LK.setTimeout(function () {
					var debrisAsset = Math.random() < 0.5 ? 'supernovaStellarDebris' : 'supernovaStellarDebris2';
					var particle = game.attachAsset(debrisAsset, {
						anchorX: 0.5,
						anchorY: 0.5
					});
					var colors = [0xFF4400, 0xFF6600, 0xFFAA00, 0xFFFFFF];
					particle.tint = colors[Math.floor(Math.random() * colors.length)];
					particle.x = self.x;
					particle.y = self.y;
					var angle = Math.random() * Math.PI * 2;
					var speed = 120 + Math.random() * 100;
					var targetX = self.x + Math.cos(angle) * speed;
					var targetY = self.y + Math.sin(angle) * speed;
					var finalScale = (0.25 + Math.random() * 0.25) * noteScale;
					particle.scale.set(0.10 * noteScale);
					tween(particle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: finalScale,
						scaleY: finalScale,
						rotation: Math.random() * Math.PI * 4 // Multiple rotations
					}, {
						duration: 1000,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
						}
					});
				}, 150 + Math.random() * 150);
			})(k);
		}
		// Stage 6: Energy Sparks (100-700ms)
		var sparkCount = 25;
		for (var l = 0; l < sparkCount; l++) {
			(function (index) {
				LK.setTimeout(function () {
					var sparkAsset = Math.random() < 0.5 ? 'supernovaEnergySpark' : 'supernovaEnergySpark2';
					var particle = game.attachAsset(sparkAsset, {
						anchorX: 0.5,
						anchorY: 0.5
					});
					particle.tint = Math.random() < 0.5 ? 0x00FFFF : 0x0088FF;
					particle.x = self.x + (Math.random() - 0.5) * 20;
					particle.y = self.y + (Math.random() - 0.5) * 20;
					var angle = Math.random() * Math.PI * 2;
					var speed = 180 + Math.random() * 220;
					var targetX = self.x + Math.cos(angle) * speed;
					var targetY = self.y + Math.sin(angle) * speed;
					var finalScale = (0.2 + Math.random() * 0.2) * noteScale;
					particle.scale.set(0.1 * noteScale);
					tween(particle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: finalScale,
						scaleY: finalScale
					}, {
						duration: 900,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
						}
					});
				}, 100 + Math.random() * 100);
			})(l);
		}
		// Stage 7: Afterglow (300-1500ms)
		LK.setTimeout(function () {
			var afterglow = game.attachAsset('supernovaAfterglow', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			afterglow.tint = 0xFF6600;
			afterglow.x = self.x;
			afterglow.y = self.y;
			afterglow.alpha = 0.4;
			afterglow.scale.set(1.2 * noteScale);
			tween(afterglow, {
				alpha: 0,
				scaleX: 3.0 * noteScale,
				scaleY: 3.0 * noteScale
			}, {
				duration: 1500,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					if (afterglow && afterglow.destroy) {
						afterglow.destroy();
					}
				}
			});
		}, 400);
	};
	self.explodeEndNoteParticles = function () {
		if (!self.endNote) {
			return;
		}
		var noteScale = 1.2; // Same scale as main note
		var endNoteGlobalX = self.x;
		var endNoteGlobalY = self.y + self.endNote.y;
		// Stage 1: Initial Flash (0-200ms)
		var flash = game.attachAsset('supernovaFlash', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		flash.tint = 0xFFFFFF;
		flash.x = endNoteGlobalX;
		flash.y = endNoteGlobalY;
		flash.alpha = 0;
		flash.scale.set(0.1 * noteScale);
		tween(flash, {
			alpha: 1,
			scaleX: 2.5 * noteScale,
			scaleY: 2.5 * noteScale
		}, {
			duration: 200,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(flash, {
					alpha: 0
				}, {
					duration: 300,
					onFinish: function onFinish() {
						if (flash && flash.destroy) {
							flash.destroy();
						}
					}
				});
			}
		});
		// Stage 2: Shockwave (100-600ms)
		LK.setTimeout(function () {
			var shockwave = game.attachAsset('supernovaShockwave', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			shockwave.tint = 0x00FFFF;
			shockwave.x = endNoteGlobalX;
			shockwave.y = endNoteGlobalY;
			shockwave.alpha = 0.9;
			shockwave.scale.set(0.2 * noteScale);
			tween(shockwave, {
				scaleX: 5.0 * noteScale,
				scaleY: 5.0 * noteScale,
				alpha: 0
			}, {
				duration: 600,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					if (shockwave && shockwave.destroy) {
						shockwave.destroy();
					}
				}
			});
		}, 100);
		// Stage 3: Core Particles (50-800ms)
		var coreParticleCount = 15;
		for (var i = 0; i < coreParticleCount; i++) {
			(function (index) {
				LK.setTimeout(function () {
					var coreAsset = Math.random() < 0.5 ? 'supernovaCoreParticle' : 'supernovaCoreParticle2';
					var particle = game.attachAsset(coreAsset, {
						anchorX: 0.5,
						anchorY: 0.5
					});
					particle.tint = Math.random() < 0.5 ? 0xFFFFFF : 0xFFFF88;
					particle.x = endNoteGlobalX;
					particle.y = endNoteGlobalY;
					var angle = index / coreParticleCount * Math.PI * 2 + (Math.random() - 0.5) * 0.5;
					var speed = 200 + Math.random() * 150;
					var targetX = endNoteGlobalX + Math.cos(angle) * speed;
					var targetY = endNoteGlobalY + Math.sin(angle) * speed;
					var finalScale = (0.3 + Math.random() * 0.4) * noteScale;
					particle.scale.set(0.1 * noteScale);
					tween(particle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: finalScale,
						scaleY: finalScale
					}, {
						duration: 750,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
						}
					});
				}, 50 + Math.random() * 100);
			})(i);
		}
		// Stage 4: Nebula Trails (200-1200ms)
		var nebulaCount = 20;
		for (var j = 0; j < nebulaCount; j++) {
			(function (index) {
				LK.setTimeout(function () {
					var nebulaAssets = ['supernovaNebulaTrail', 'supernovaNebulaTrail2', 'supernovaNebulaTrail3'];
					var nebulaAsset = nebulaAssets[Math.floor(Math.random() * nebulaAssets.length)];
					var particle = game.attachAsset(nebulaAsset, {
						anchorX: 0.5,
						anchorY: 0.5
					});
					var colors = [0x8844FF, 0xFF44AA, 0x4488FF, 0xAA44FF];
					particle.tint = colors[Math.floor(Math.random() * colors.length)];
					particle.x = endNoteGlobalX + (Math.random() - 0.5) * 40;
					particle.y = endNoteGlobalY + (Math.random() - 0.5) * 40;
					particle.alpha = 0.7 + Math.random() * 0.3;
					var angle = Math.random() * Math.PI * 2;
					var speed = 80 + Math.random() * 120;
					var targetX = endNoteGlobalX + Math.cos(angle) * speed;
					var targetY = endNoteGlobalY + Math.sin(angle) * speed;
					var finalScale = (0.2 + Math.random() * 0.3) * noteScale;
					particle.scale.set(0.1 * noteScale);
					tween(particle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: finalScale,
						scaleY: finalScale,
						rotation: Math.random() * Math.PI * 2
					}, {
						duration: 1000,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
						}
					});
				}, 200 + Math.random() * 200);
			})(j);
		}
		// Stage 5: Stellar Debris (150-1000ms)
		var debrisCount = 12;
		for (var k = 0; k < debrisCount; k++) {
			(function (index) {
				LK.setTimeout(function () {
					var debrisAsset = Math.random() < 0.5 ? 'supernovaStellarDebris' : 'supernovaStellarDebris2';
					var particle = game.attachAsset(debrisAsset, {
						anchorX: 0.5,
						anchorY: 0.5
					});
					var colors = [0xFF4400, 0xFF6600, 0xFFAA00, 0xFFFFFF];
					particle.tint = colors[Math.floor(Math.random() * colors.length)];
					particle.x = endNoteGlobalX;
					particle.y = endNoteGlobalY;
					var angle = Math.random() * Math.PI * 2;
					var speed = 120 + Math.random() * 100;
					var targetX = endNoteGlobalX + Math.cos(angle) * speed;
					var targetY = endNoteGlobalY + Math.sin(angle) * speed;
					var finalScale = (0.15 + Math.random() * 0.25) * noteScale;
					particle.scale.set(0.05 * noteScale);
					tween(particle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: finalScale,
						scaleY: finalScale,
						rotation: Math.random() * Math.PI * 4
					}, {
						duration: 850,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
						}
					});
				}, 150 + Math.random() * 150);
			})(k);
		}
		// Stage 6: Energy Sparks (100-700ms)
		var sparkCount = 25;
		for (var l = 0; l < sparkCount; l++) {
			(function (index) {
				LK.setTimeout(function () {
					var sparkAsset = Math.random() < 0.5 ? 'supernovaEnergySpark' : 'supernovaEnergySpark2';
					var particle = game.attachAsset(sparkAsset, {
						anchorX: 0.5,
						anchorY: 0.5
					});
					particle.tint = Math.random() < 0.5 ? 0x00FFFF : 0x0088FF;
					particle.x = endNoteGlobalX + (Math.random() - 0.5) * 20;
					particle.y = endNoteGlobalY + (Math.random() - 0.5) * 20;
					var angle = Math.random() * Math.PI * 2;
					var speed = 180 + Math.random() * 220;
					var targetX = endNoteGlobalX + Math.cos(angle) * speed;
					var targetY = endNoteGlobalY + Math.sin(angle) * speed;
					var finalScale = (0.1 + Math.random() * 0.2) * noteScale;
					particle.scale.set(0.05 * noteScale);
					tween(particle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: finalScale,
						scaleY: finalScale
					}, {
						duration: 600,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
						}
					});
				}, 100 + Math.random() * 100);
			})(l);
		}
		// Stage 7: Afterglow (300-1500ms)
		LK.setTimeout(function () {
			var afterglow = game.attachAsset('supernovaAfterglow', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			afterglow.tint = 0xFF6600;
			afterglow.x = endNoteGlobalX;
			afterglow.y = endNoteGlobalY;
			afterglow.alpha = 0.4;
			afterglow.scale.set(1.2 * noteScale);
			tween(afterglow, {
				alpha: 0,
				scaleX: 2.0 * noteScale,
				scaleY: 2.0 * noteScale
			}, {
				duration: 1200,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					if (afterglow && afterglow.destroy) {
						afterglow.destroy();
					}
				}
			});
		}, 300);
	};
	self.updateHoldEffects = function (scannerCurrentY) {
		if (self.type === 'hold' && self.isHolding && self.active && !self.holdSuccessfullyCompleted && !self.isMissed) {
			var currentTime = Date.now();
			if (currentTime - self.lastParticleEmissionTime > self.PARTICLE_EMISSION_INTERVAL) {
				self.lastParticleEmissionTime = currentTime;
				var trailStartY = self.y;
				var trailEndY = self.y + (self.endNote ? self.endNote.y : 0);
				var scannerIsOverTrail = self.endNote && scannerCurrentY >= Math.min(trailStartY, trailEndY) && scannerCurrentY <= Math.max(trailStartY, trailEndY);
				if (scannerIsOverTrail) {
					var particle = game.attachAsset('holdConnectionParticle', {
						anchorX: 0.5,
						anchorY: 0.5
					});
					particle.x = self.x;
					particle.y = scannerCurrentY;
					particle.tint = self.color;
					particle.alpha = 0.8;
					self.holdParticles.push(particle);
					tween(particle, {
						alpha: 0,
						scaleX: 0.2,
						scaleY: 0.2
					}, {
						duration: 500,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (particle && particle.destroy) {
								particle.destroy();
							}
							var index = self.holdParticles.indexOf(particle);
							if (index > -1) {
								self.holdParticles.splice(index, 1);
							}
						}
					});
				}
			}
		}
	};
	self.cleanupHoldVisuals = function () {
		self.holdParticles.forEach(function (p) {
			if (p && p.destroy) {
				p.destroy();
			}
		});
		self.holdParticles = [];
		if (self.endNote && self.endNote.destroy) {
			self.endNote.destroy();
		}
		if (self.endGlow && self.endGlow.destroy) {
			self.endGlow.destroy();
		}
		self.endNote = null;
		self.endGlow = null;
		self.holdTrails.forEach(function (trail) {
			if (trail && trail.destroy) {
				trail.destroy();
			}
		});
		self.holdTrails = [];
	};
	self.completeHold = function () {
		if (self.holdSuccessfullyCompleted || self.isMissed) {
			return;
		}
		self._clearBeatPulseLoop();
		self.holdSuccessfullyCompleted = true;
		self.isHolding = false;
		self.explodeIntoParticles();
		if (self.type === 'hold') {
			self.explodeEndNoteParticles();
		}
		self.cleanupHoldVisuals();
		tween(self, {
			alpha: 0
		}, {
			duration: 100,
			delay: 100,
			onFinish: function onFinish() {
				self.active = false;
				self._clearBeatPulseLoop();
			}
		});
	};
	self.failHold = function () {
		if (self.isMissed || self.holdSuccessfullyCompleted) {
			return;
		}
		self._clearBeatPulseLoop();
		self.isMissed = true;
		self.isHolding = false;
		self.showMissEffect();
		self.cleanupHoldVisuals();
	};
	return self;
});
var Scanner = Container.expand(function () {
	var self = Container.call(this);
	self.glow = self.attachAsset('scannerGlow', {
		anchorX: 0,
		anchorY: 0.5
	});
	self.glow.alpha = 0.2;
	self.line = self.attachAsset('scannerLine', {
		anchorX: 0,
		anchorY: 0.5
	});
	self.x = 0;
	self.isMovingUp = true;
	return self;
});

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

/**** 
* Game Code
****/ 
// Add these global variables (replace the previous ones)
var globalParticleDirection = {
	x: 0,
	y: 1
}; // Start moving downward
var targetParticleDirection = {
	x: 0,
	y: 1
};
var directionChangeStartTime = 0;
var directionChangeDuration = 1000; // 1 second
var isChangingDirection = false;
var lastDirectionChangeTime = 0;
var nextDirectionChangeDelay = 15000 + Math.random() * 15000; // 15-30 seconds
var baseParticleSpeed = 1; // Base speed multiplier
var countdownAcceleration = 1; // Separate from base speed
var isCountdownActive = false;
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var SAFETY_MARGIN_TOP_PERCENT = 0.05;
var SAFETY_MARGIN_BOTTOM_PERCENT = 0.15;
var SAFETY_MARGIN_SIDES_PERCENT = 0.10;
var BPM = 120;
var BEAT_DURATION_MS = 60 / BPM * 1000;
var SCANNER_Y_MIN = GAME_HEIGHT * SAFETY_MARGIN_TOP_PERCENT;
var SCANNER_Y_MAX = GAME_HEIGHT * (1 - SAFETY_MARGIN_BOTTOM_PERCENT);
var PLAY_AREA_HEIGHT = SCANNER_Y_MAX - SCANNER_Y_MIN;
var NOTE_SPAWN_AHEAD_MS = 800;
var PERFECT_HIT_RATIO = 0.4;
var POINTS_PERFECT_TAP = 30;
var POINTS_GOOD_TAP = 15;
var POINTS_PERFECT_HOLD_START = 10;
var POINTS_GOOD_HOLD_START = 5;
var ACCURACY_POPUP_DURATION = 750;
var ACCURACY_POPUP_Y_OFFSET = -100;
var ACCURACY_POPUP_FONT_SIZE = 80;
var PERFECT_POPUP_COLOR = 0x00FF00;
var GOOD_POPUP_COLOR = 0xFFFF00;
var SCANNER_CYCLE_DURATION = 4000;
var SCANNER_HALF_CYCLE = SCANNER_CYCLE_DURATION / 2;
var HIT_TOLERANCE_PX_FOR_HOLD_END = 100;
var HOLD_END_GRACE_PERIOD_MS = 250;
var GAME_STATE_TITLE = 'title';
var GAME_STATE_SONG_SELECT = 'songSelect';
var GAME_STATE_PLAYING = 'playing';
var GAME_STATE_RESULTS = 'results';
var GAME_STATE_TUTORIAL = 'tutorial'; // New game state for the tutorial
var currentGameState = GAME_STATE_TITLE;
var resultsScreen = {};
var tutorialScreen = {}; // Holds tutorial screen elements
var activeHoldNotes = {};
var scoreTxt;
var countdownTxt;
var perfectCount = 0;
var goodCount = 0;
var missCount = 0;
var scanner;
var scannerIsMovingUp = true;
var gameStartTime;
var gameStarted = false;
var notes = [];
var currentSongData;
var spawnedNotes = [];
var leftZone, rightZone;
var isDragging = false;
var dragStartX, dragStartY;
var currentTrail = [];
var backgroundParticles = [];
var NUM_BACKGROUND_PARTICLES = 150;
var titleScreen = {};
var songSelectScreen = {};
var songSelectScrollY = 0;
var maxScrollY = 0;
var isDraggingSongList = false;
var dragStartYSongList = 0;
var songSelectionInProgress = false; // Flag to prevent multiple song selections simultaneously
var SONG_ITEM_HEIGHT = 330;
var COLOR_LEFT_ZONE = 0x0077FF;
var COLOR_RIGHT_ZONE = 0xFF3333;
var COLOR_SYNC_TAP = 0xFF69B4;
var COLOR_SYNC_HOLD = 0x9370DB;
var SYNC_NOTE_COLOR = 0xFFA500;
// Helper function to get current particle direction with smooth interpolation
function getCurrentParticleDirection() {
	if (!isChangingDirection) {
		return globalParticleDirection;
	}
	var currentTime = Date.now();
	var elapsed = currentTime - directionChangeStartTime;
	var progress = Math.min(elapsed / directionChangeDuration, 1);
	// Smooth easing
	var easedProgress = progress * progress * (3 - 2 * progress); // Smoothstep
	// Interpolate between current and target direction
	var lerpX = globalParticleDirection.x + (targetParticleDirection.x - globalParticleDirection.x) * easedProgress;
	var lerpY = globalParticleDirection.y + (targetParticleDirection.y - globalParticleDirection.y) * easedProgress;
	// Normalize the direction
	var length = Math.sqrt(lerpX * lerpX + lerpY * lerpY);
	if (length > 0) {
		lerpX /= length;
		lerpY /= length;
	}
	// Check if transition is complete
	if (progress >= 1) {
		isChangingDirection = false;
		globalParticleDirection.x = targetParticleDirection.x;
		globalParticleDirection.y = targetParticleDirection.y;
		lastDirectionChangeTime = currentTime;
		nextDirectionChangeDelay = 15000 + Math.random() * 15000; // 15-30 seconds
	}
	return {
		x: lerpX,
		y: lerpY
	};
}
// Function to initiate a direction change
function changeParticleDirection() {
	if (isChangingDirection) {
		return;
	} // Already changing
	// Generate a new direction 45-90 degrees from current
	var angleChange = Math.PI / 4 + Math.random() * (Math.PI / 4); // 45-90 degrees
	if (Math.random() < 0.5) {
		angleChange = -angleChange;
	} // Random direction
	var currentAngle = Math.atan2(globalParticleDirection.y, globalParticleDirection.x);
	var newAngle = currentAngle + angleChange;
	targetParticleDirection.x = Math.cos(newAngle);
	targetParticleDirection.y = Math.sin(newAngle);
	isChangingDirection = true;
	directionChangeStartTime = Date.now();
}
var PatternTemplates = {
	tapLeft: function tapLeft(startTime) {
		return [{
			time: startTime,
			type: 'tap',
			zone: 'left'
		}];
	},
	tapRight: function tapRight(startTime) {
		return [{
			time: startTime,
			type: 'tap',
			zone: 'right'
		}];
	},
	syncTap: function syncTap(startTime) {
		return [{
			time: startTime,
			type: 'tap',
			zone: 'left'
		}, {
			time: startTime,
			type: 'tap',
			zone: 'right'
		}];
	},
	leftRightTaps: function leftRightTaps(startTime, spacing) {
		spacing = spacing || 500;
		return [{
			time: startTime,
			type: 'tap',
			zone: 'left'
		}, {
			time: startTime + spacing,
			type: 'tap',
			zone: 'right'
		}];
	},
	rightLeftTaps: function rightLeftTaps(startTime, spacing) {
		spacing = spacing || 500;
		return [{
			time: startTime,
			type: 'tap',
			zone: 'right'
		}, {
			time: startTime + spacing,
			type: 'tap',
			zone: 'left'
		}];
	},
	holdLeft: function holdLeft(startTime, duration) {
		duration = duration || 1000;
		return [{
			time: startTime,
			type: 'hold',
			zone: 'left',
			duration: duration
		}];
	},
	holdRight: function holdRight(startTime, duration) {
		duration = duration || 1000;
		return [{
			time: startTime,
			type: 'hold',
			zone: 'right',
			duration: duration
		}];
	},
	syncHold: function syncHold(startTime, duration) {
		duration = duration || 1000;
		return [{
			time: startTime,
			type: 'hold',
			zone: 'left',
			duration: duration
		}, {
			time: startTime,
			type: 'hold',
			zone: 'right',
			duration: duration
		}];
	},
	tripletTaps: function tripletTaps(startTime, zone, spacing) {
		spacing = spacing || 167;
		return [{
			time: startTime,
			type: 'tap',
			zone: zone
		}, {
			time: startTime + spacing,
			type: 'tap',
			zone: zone
		}, {
			time: startTime + spacing * 2,
			type: 'tap',
			zone: zone
		}];
	},
	alternatingTriplets: function alternatingTriplets(startTime, spacing) {
		spacing = spacing || 167;
		return [{
			time: startTime,
			type: 'tap',
			zone: 'left'
		}, {
			time: startTime + spacing,
			type: 'tap',
			zone: 'right'
		}, {
			time: startTime + spacing * 2,
			type: 'tap',
			zone: 'left'
		}];
	},
	buildUp: function buildUp(startTime) {
		return [{
			time: startTime,
			type: 'tap',
			zone: 'left'
		}, {
			time: startTime + 250,
			type: 'tap',
			zone: 'right'
		}, {
			time: startTime + 500,
			type: 'tap',
			zone: 'left'
		}, {
			time: startTime + 625,
			type: 'tap',
			zone: 'right'
		}, {
			time: startTime + 750,
			type: 'tap',
			zone: 'left'
		}, {
			time: startTime + 875,
			type: 'tap',
			zone: 'right'
		}];
	}
};
var SongGenerator = {
	generateSong: function generateSong(config) {
		var notes = [];
		var totalLength = config.totalLength || 202136;
		var startTime = config.startDelay || 2000;
		notes = this.generateZoneAwareSong(startTime, totalLength);
		notes.sort(function (a, b) {
			return a.time - b.time;
		});
		return notes;
	},
	generateZoneAwareSong: function generateZoneAwareSong(startTime, songTotalLength) {
		var notes = [];
		var currentTime = startTime;
		var zoneFreeTime = {
			left: startTime,
			right: startTime
		};
		var MIN_SAME_ZONE_SPACING = 400;
		var MIN_DIFFERENT_ZONE_SPACING = 200;
		var MIN_SYNC_SPACING = 1000;
		var lastSyncTime = startTime - MIN_SYNC_SPACING;
		var sections = [{
			start: 0,
			end: 16000,
			complexity: 'simple'
		}, {
			start: 16000,
			end: 48000,
			complexity: 'medium'
		}, {
			start: 48000,
			end: 72000,
			complexity: 'medium'
		}, {
			start: 72000,
			end: 104000,
			complexity: 'medium'
		}, {
			start: 104000,
			end: 128000,
			complexity: 'complex'
		}, {
			start: 128000,
			end: 160000,
			complexity: 'medium'
		}, {
			start: 160000,
			end: 184000,
			complexity: 'complex'
		}, {
			start: 184000,
			end: songTotalLength,
			complexity: 'simple'
		}];
		for (var s = 0; s < sections.length; s++) {
			var section = sections[s];
			var sectionStartTime = startTime + section.start;
			var sectionEndTime = startTime + section.end;
			if (sectionEndTime > startTime + songTotalLength) {
				sectionEndTime = startTime + songTotalLength;
			}
			if (sectionStartTime >= sectionEndTime) {
				continue;
			}
			currentTime = Math.max(currentTime, sectionStartTime);
			while (currentTime < sectionEndTime - 1000) {
				var pattern = this.selectPattern(section.complexity, zoneFreeTime, currentTime, lastSyncTime);
				var patternResult = this.placePattern(pattern, currentTime, zoneFreeTime, MIN_SAME_ZONE_SPACING, MIN_DIFFERENT_ZONE_SPACING, sectionEndTime);
				if (patternResult.notes.length > 0) {
					var allNotesFit = true;
					for (var ni = 0; ni < patternResult.notes.length; ni++) {
						if (patternResult.notes[ni].time + (patternResult.notes[ni].duration || 0) > sectionEndTime - 200) {
							allNotesFit = false;
							break;
						}
					}
					if (allNotesFit) {
						notes = notes.concat(patternResult.notes);
						currentTime = patternResult.nextTime;
						if (pattern.type === 'sync' || pattern.type === 'syncHold') {
							lastSyncTime = patternResult.notes[0].time;
						}
					} else {
						currentTime += 300;
					}
				} else {
					currentTime += 300;
				}
				if (currentTime >= sectionEndTime - 1000) {
					break;
				}
			}
		}
		return notes;
	},
	selectPattern: function selectPattern(complexity, zoneFreeTime, currentTime, lastSyncTime) {
		var patterns = [];
		var MIN_SYNC_SPACING_FOR_SELECTION = 1000;
		if (complexity === 'simple') {
			patterns = [{
				type: 'single',
				zone: 'left',
				duration: 800
			}, {
				type: 'single',
				zone: 'right',
				duration: 800
			}, {
				type: 'rest',
				duration: 1200
			}, {
				type: 'rest',
				duration: 1200
			}];
			if (currentTime - lastSyncTime >= MIN_SYNC_SPACING_FOR_SELECTION + 200) {
				patterns.push({
					type: 'sync',
					duration: 1000
				});
			}
		} else if (complexity === 'medium') {
			patterns = [{
				type: 'hold',
				zone: 'right',
				holdDuration: 1000,
				duration: 700
			}, {
				type: 'single',
				zone: 'left',
				duration: 600
			}, {
				type: 'single',
				zone: 'right',
				duration: 600
			}, {
				type: 'single',
				zone: 'left',
				duration: 600
			}, {
				type: 'single',
				zone: 'right',
				duration: 600
			}, {
				type: 'alternating',
				duration: 750
			}, {
				type: 'rest',
				duration: 1000
			}];
			if (currentTime - lastSyncTime >= MIN_SYNC_SPACING_FOR_SELECTION) {
				patterns.push({
					type: 'sync',
					duration: 800
				});
				patterns.push({
					type: 'sync',
					duration: 800
				});
			}
		} else {
			patterns = [{
				type: 'hold',
				zone: 'right',
				holdDuration: 1200,
				duration: 800
			}, {
				type: 'alternating',
				duration: 800
			}, {
				type: 'alternating',
				duration: 800
			}, {
				type: 'single',
				zone: 'left',
				duration: 700
			}, {
				type: 'single',
				zone: 'right',
				duration: 700
			}, {
				type: 'single',
				zone: 'left',
				duration: 700
			}, {
				type: 'single',
				zone: 'right',
				duration: 700
			}];
			if (currentTime - lastSyncTime >= MIN_SYNC_SPACING_FOR_SELECTION - 200) {
				patterns.push({
					type: 'sync',
					duration: 600
				});
				patterns.push({
					type: 'sync',
					duration: 600
				});
				patterns.push({
					type: 'syncHold',
					holdDuration: 1200,
					duration: 900
				});
			}
		}
		return patterns[Math.floor(Math.random() * patterns.length)];
	},
	placePattern: function placePattern(pattern, requestedTime, zoneFreeTime, minSameZoneSpacing, minDiffZoneSpacing, sectionEndTime) {
		var notes = [];
		var earliestTime = requestedTime;
		var nextTimeAdvance = pattern.duration || 500;
		if (pattern.type === 'single') {
			earliestTime = Math.max(requestedTime, zoneFreeTime[pattern.zone]);
			if (earliestTime + (pattern.duration || 0) < sectionEndTime) {
				notes.push({
					time: earliestTime,
					type: 'tap',
					zone: pattern.zone
				});
				zoneFreeTime[pattern.zone] = earliestTime + minSameZoneSpacing;
				return {
					notes: notes,
					nextTime: earliestTime + nextTimeAdvance
				};
			}
		} else if (pattern.type === 'sync') {
			earliestTime = Math.max(requestedTime, zoneFreeTime.left, zoneFreeTime.right);
			if (earliestTime + (pattern.duration || 0) < sectionEndTime) {
				notes.push({
					time: earliestTime,
					type: 'tap',
					zone: 'left',
					color: SYNC_NOTE_COLOR
				});
				notes.push({
					time: earliestTime,
					type: 'tap',
					zone: 'right',
					color: SYNC_NOTE_COLOR
				});
				zoneFreeTime.left = earliestTime + minSameZoneSpacing;
				zoneFreeTime.right = earliestTime + minSameZoneSpacing;
				return {
					notes: notes,
					nextTime: earliestTime + nextTimeAdvance
				};
			}
		} else if (pattern.type === 'alternating') {
			var firstZone = Math.random() < 0.5 ? 'left' : 'right';
			var secondZone = firstZone === 'left' ? 'right' : 'left';
			var t1 = Math.max(requestedTime, zoneFreeTime[firstZone]);
			var t2 = Math.max(t1 + minDiffZoneSpacing, zoneFreeTime[secondZone]);
			if (t2 + (pattern.duration || 0) - (t2 - t1) < sectionEndTime) {
				notes.push({
					time: t1,
					type: 'tap',
					zone: firstZone
				});
				notes.push({
					time: t2,
					type: 'tap',
					zone: secondZone
				});
				zoneFreeTime[firstZone] = t1 + minSameZoneSpacing;
				zoneFreeTime[secondZone] = t2 + minSameZoneSpacing;
				return {
					notes: notes,
					nextTime: t1 + nextTimeAdvance
				};
			}
		} else if (pattern.type === 'syncHold') {
			earliestTime = Math.max(requestedTime, zoneFreeTime.left, zoneFreeTime.right);
			var holdDuration = pattern.holdDuration || 1200;
			if (earliestTime + holdDuration < sectionEndTime) {
				notes.push({
					time: earliestTime,
					type: 'hold',
					zone: 'left',
					duration: holdDuration,
					color: SYNC_NOTE_COLOR
				});
				notes.push({
					time: earliestTime,
					type: 'hold',
					zone: 'right',
					duration: holdDuration,
					color: SYNC_NOTE_COLOR
				});
				zoneFreeTime.left = earliestTime + holdDuration + 200;
				zoneFreeTime.right = earliestTime + holdDuration + 200;
				return {
					notes: notes,
					nextTime: earliestTime + (pattern.duration || 800)
				};
			}
		} else if (pattern.type === 'hold') {
			earliestTime = Math.max(requestedTime, zoneFreeTime[pattern.zone]);
			var holdDuration = pattern.holdDuration || 1500;
			if (earliestTime + holdDuration < sectionEndTime) {
				notes.push({
					time: earliestTime,
					type: 'hold',
					zone: pattern.zone,
					duration: holdDuration
				});
				var otherZone = pattern.zone === 'left' ? 'right' : 'left';
				zoneFreeTime[pattern.zone] = earliestTime + holdDuration + 200;
				zoneFreeTime[otherZone] = Math.max(zoneFreeTime[otherZone], earliestTime + holdDuration + minDiffZoneSpacing);
				return {
					notes: notes,
					nextTime: earliestTime + nextTimeAdvance
				};
			}
		} else if (pattern.type === 'rest') {
			return {
				notes: [],
				nextTime: requestedTime + (pattern.duration || 500)
			};
		}
		return {
			notes: [],
			nextTime: requestedTime + 100
		};
	}
};
function _createTutorialText(text, size, yPos, parent, fill, align, customX) {
	var textObj = new Text2(text, {
		size: size,
		fill: fill || 0xFFFFFF,
		wordWrap: true,
		wordWrapWidth: GAME_WIDTH - 200,
		// 100px padding each side
		align: align || 'left'
	});
	if (align === 'center') {
		textObj.anchor.set(0.5, 0);
		textObj.x = customX || GAME_WIDTH / 2;
	} else {
		// left align
		textObj.anchor.set(0, 0);
		textObj.x = customX || 100;
	}
	textObj.y = yPos;
	parent.addChild(textObj);
	return textObj;
}
function _createTutorialNoteVisual(assetId, color, xPos, yPos, scale, parent) {
	var noteVisual = LK.getAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: scale || 0.35,
		scaleY: scale || 0.35
	});
	noteVisual.tint = color;
	noteVisual.x = xPos;
	noteVisual.y = yPos;
	parent.addChild(noteVisual);
	return noteVisual;
}
var SongDatabase = {
	'Remember This': {
		bpm: 99,
		scannerCycleDuration: 4000,
		totalLength: 205078,
		highScore: storage.highScores && storage.highScores['Remember This'] || 0,
		highestGrade: storage.highestGrades && storage.highestGrades['Remember This'] || 'C',
		notes: [{
			"time": 673,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 1277,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 2461,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 3065,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 4249,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 4852,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 6060,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 6664,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 7848,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 8452,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 9659,
			"type": "tap",
			"zone": "left",
			"color": 16753920
		}, {
			"time": 9659,
			"type": "tap",
			"zone": "right",
			"color": 16753920
		}, {
			"time": 10263,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 10866,
			"type": "hold",
			"zone": "right",
			"duration": 1000
		}, {
			"time": 12654,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 13258,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 13862,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 14466,
			"type": "tap",
			"zone": "left",
			"color": 16753920
		}, {
			"time": 14466,
			"type": "tap",
			"zone": "right",
			"color": 16753920
		}, {
			"time": 15046,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 15650,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 16253,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 16857,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 17257,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 18065,
			"type": "hold",
			"zone": "left",
			"duration": 1000
		}, {
			"time": 19853,
			"type": "tap",
			"zone": "right"
		}, {
			"time": 20456,
			"type": "tap",
			"zone": "left"
		}, {
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			"type": "tap",
			"zone": "right"
		}, {
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			"type": "tap",
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		}, {
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			"type": "tap",
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		}, {
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			"type": "tap",
			"zone": "left"
		}, {
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			"type": "tap",
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			"color": 16753920
		}, {
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			"type": "tap",
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			"color": 16753920
		}, {
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			"type": "tap",
			"zone": "right"
		}, {
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			"type": "hold",
			"zone": "right",
			"duration": 1000
		}, {
			"time": 27051,
			"type": "tap",
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		}, {
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			"type": "tap",
			"zone": "left"
		}, {
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			"type": "tap",
			"zone": "right"
		}, {
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			"type": "tap",
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			"color": 16753920
		}, {
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			"type": "tap",
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		}, {
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			"type": "hold",
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		}, {
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			"type": "tap",
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		}, {
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		}, {
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		}, {
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			"type": "tap",
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		}, {
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			"type": "hold",
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			"type": "tap",
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		}, {
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		}, {
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			"type": "tap",
			"zone": "left"
		}, {
			"time": 219428,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 220636,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 221936,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 223236,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 224536,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 225837,
			"type": "tap",
			"zone": "left"
		}, {
			"time": 227137,
			"type": "tap",
			"zone": "left"
		}]
	}
};
function getSongLength(songName) {
	var song = SongDatabase[songName];
	if (!song) {
		return "0:00";
	}
	var totalSeconds = Math.floor(song.totalLength / 1000);
	var minutes = Math.floor(totalSeconds / 60);
	var seconds = totalSeconds % 60;
	return minutes + ":" + (seconds < 10 ? "0" : "") + seconds;
}
function updateHighScore(songName, score, grade) {
	var updated = false;
	if (SongDatabase[songName]) {
		if (score > SongDatabase[songName].highScore) {
			SongDatabase[songName].highScore = score;
			// Save high scores to storage
			if (!storage.highScores) {
				storage.highScores = {};
			}
			storage.highScores[songName] = score;
			updated = true;
		}
		// Update grade if it's better (S > A > B > C)
		var currentGrade = SongDatabase[songName].highestGrade || 'C';
		var gradeOrder = ['C', 'B', 'A', 'S'];
		if (gradeOrder.indexOf(grade) > gradeOrder.indexOf(currentGrade)) {
			SongDatabase[songName].highestGrade = grade;
			// Save highest grades to storage
			if (!storage.highestGrades) {
				storage.highestGrades = {};
			}
			storage.highestGrades[songName] = grade;
			updated = true;
		}
	}
	return updated;
}
function calculateNotePosition(noteTime) {
	var cycleTime = noteTime % SCANNER_CYCLE_DURATION;
	var y;
	if (cycleTime < SCANNER_HALF_CYCLE) {
		var progress = cycleTime / SCANNER_HALF_CYCLE;
		y = SCANNER_Y_MAX - progress * PLAY_AREA_HEIGHT;
	} else {
		var progress = (cycleTime - SCANNER_HALF_CYCLE) / SCANNER_HALF_CYCLE;
		y = SCANNER_Y_MIN + progress * PLAY_AREA_HEIGHT;
	}
	return y;
}
function calculateZoneX(zone, noteY) {
	var sideMargin = GAME_WIDTH * SAFETY_MARGIN_SIDES_PERCENT;
	var randomSpan = GAME_WIDTH / 2 - 2 * sideMargin;
	if (randomSpan < 0) {
		randomSpan = 0;
	}
	// Check if note is in the bottom 15% of the play area
	var isInBottomArea = noteY > SCANNER_Y_MAX - PLAY_AREA_HEIGHT * 0.15;
	var xPosition;
	if (zone === 'left') {
		xPosition = sideMargin;
		if (isInBottomArea) {
			// In bottom area, favor the right side of the left zone (more central)
			// Use the right 60% of the left zone's available space
			var centralSpan = randomSpan * 0.6;
			var offset = randomSpan * 0.4; // Skip the leftmost 40%
			xPosition += offset + Math.random() * centralSpan;
		} else {
			// Normal positioning for upper areas
			xPosition += Math.random() * randomSpan;
		}
	} else {
		xPosition = GAME_WIDTH / 2 + sideMargin;
		if (isInBottomArea) {
			// In bottom area, favor the left side of the right zone (more central)
			// Use the left 60% of the right zone's available space
			var centralSpan = randomSpan * 0.6;
			xPosition += Math.random() * centralSpan;
		} else {
			// Normal positioning for upper areas
			xPosition += Math.random() * randomSpan;
		}
	}
	return xPosition;
}
function createZoneIndicators() {
	leftZone = game.attachAsset('zoneIndicator', {
		anchorX: 0,
		anchorY: 0
	});
	leftZone.x = 0;
	leftZone.y = 0;
	leftZone.width = GAME_WIDTH / 2;
	leftZone.alpha = 0.1;
	leftZone.tint = 0x00ffff;
	rightZone = game.attachAsset('zoneIndicator', {
		anchorX: 0,
		anchorY: 0
	});
	rightZone.x = GAME_WIDTH / 2;
	rightZone.y = 0;
	rightZone.width = GAME_WIDTH / 2;
	rightZone.alpha = 0.1;
	rightZone.tint = 0xff00ff;
}
function showAccuracyPopup(text, x, y, color) {
	var popup = new Text2(text, {
		size: ACCURACY_POPUP_FONT_SIZE,
		fill: color,
		stroke: 0x000000,
		strokeThickness: 4
	});
	popup.anchor.set(0.5, 0.5);
	popup.x = x;
	popup.y = y + ACCURACY_POPUP_Y_OFFSET;
	popup.alpha = 0;
	game.addChild(popup);
	var initialY = popup.y;
	tween(popup, {
		alpha: 1,
		y: initialY - 30
	}, {
		duration: ACCURACY_POPUP_DURATION * 0.25,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			tween(popup, {
				alpha: 0,
				y: initialY - 130
			}, {
				duration: ACCURACY_POPUP_DURATION * 0.75,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					if (popup && popup.destroy) {
						popup.destroy();
					}
				}
			});
		}
	});
}
function initializeTitleScreen() {
	titleScreen.container = new Container();
	game.addChild(titleScreen.container);
	titleScreen.title = titleScreen.container.attachAsset('titleImage', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	titleScreen.title.x = GAME_WIDTH / 2;
	titleScreen.title.y = GAME_HEIGHT / 2 - 200;
	titleScreen.subtitle = new Text2('Press to Start', {
		size: 100,
		fill: 0xCCCCCC
	});
	titleScreen.subtitle.anchor.set(0.5, 0.5);
	titleScreen.subtitle.x = GAME_WIDTH / 2;
	titleScreen.subtitle.y = GAME_HEIGHT / 2 + 100 + GAME_HEIGHT * 0.15;
	titleScreen.container.addChild(titleScreen.subtitle);
	var pulseScale = 1;
	var pulseDirection = 1;
	titleScreen.pulseInterval = LK.setInterval(function () {
		pulseScale += pulseDirection * 0.02;
		if (pulseScale > 1.1) {
			pulseScale = 1.1;
			pulseDirection = -1;
		} else if (pulseScale < 0.9) {
			pulseScale = 0.9;
			pulseDirection = 1;
		}
		titleScreen.subtitle.scale.set(pulseScale);
	}, 50);
}
function initializeSongSelectScreen() {
	songSelectScreen.container = new Container();
	game.addChild(songSelectScreen.container);
	songSelectScreen.container.visible = false;
	songSelectScreen.title = new Text2('Select Song', {
		size: 150,
		fill: 0xFFFFFF
	});
	songSelectScreen.title.anchor.set(0.5, 0);
	songSelectScreen.title.x = GAME_WIDTH / 2;
	songSelectScreen.title.y = 100;
	songSelectScreen.container.addChild(songSelectScreen.title);
	songSelectScreen.scrollContainer = new Container();
	songSelectScreen.scrollContainer.x = 0;
	songSelectScreen.scrollContainer.y = 300;
	songSelectScreen.container.addChild(songSelectScreen.scrollContainer);
	createSongItems();
	updateScrollLimits();
	songSelectScreen.tutorialButton = new Text2('How to Play', {
		size: 90,
		fill: 0xCCCCCC
	});
	songSelectScreen.tutorialButton.anchor.set(0.5, 1);
	songSelectScreen.tutorialButton.x = GAME_WIDTH / 2;
	songSelectScreen.tutorialButton.y = GAME_HEIGHT - 60; // Positioned at the bottom
	songSelectScreen.container.addChild(songSelectScreen.tutorialButton);
}
function createSongItems() {
	songSelectScreen.items = [];
	var songNames = Object.keys(SongDatabase);
	for (var i = 0; i < songNames.length; i++) {
		var songName = songNames[i];
		var song = SongDatabase[songName];
		var yPos = i * (SONG_ITEM_HEIGHT + 50);
		var itemContainer = new Container();
		itemContainer.x = 100;
		itemContainer.y = yPos;
		itemContainer.songName = songName;
		var bg = game.attachAsset('zoneIndicator', {
			anchorX: 0,
			anchorY: 0
		});
		bg.width = GAME_WIDTH - 200;
		bg.height = SONG_ITEM_HEIGHT;
		bg.alpha = 0.2;
		bg.tint = 0x333333;
		itemContainer.addChild(bg);
		var displayName = songName;
		if (songName === 'Runner') {
			displayName = songName + ' (Hard)';
		}
		var titleText = new Text2(displayName, {
			size: 100,
			fill: 0xFFFFFF
		});
		titleText.anchor.set(0.5, 0); // Center horizontally, align top vertically
		titleText.x = (GAME_WIDTH - 200) / 2; // Center within the background width
		titleText.y = 30;
		itemContainer.addChild(titleText);
		// Define vertical padding between text elements
		var verticalPadding = 20;
		var infoText = new Text2('BPM: ' + song.bpm + ' | Length: ' + getSongLength(songName), {
			size: 62.5,
			fill: 0xCCCCCC
		});
		infoText.anchor.set(0.5, 0); // Center horizontally, align top vertically
		infoText.x = (GAME_WIDTH - 200) / 2; // Center within the background width
		// Position infoText below titleText (assuming titleText font size 100 is approx height)
		infoText.y = titleText.y + 100 + verticalPadding;
		itemContainer.addChild(infoText);
		var gradeDisplay = song.highestGrade || 'C';
		var scoreText = new Text2('High Score: ' + song.highScore + ' | Grade: ' + gradeDisplay, {
			size: 62.5,
			fill: 0xFFDD00
		});
		scoreText.anchor.set(0.5, 0); // Center horizontally, align top vertically
		scoreText.x = (GAME_WIDTH - 200) / 2; // Center within the background width
		// Position scoreText below infoText (assuming infoText font size 62.5 is approx height)
		scoreText.y = infoText.y + 62.5 + verticalPadding;
		itemContainer.addChild(scoreText);
		songSelectScreen.scrollContainer.addChild(itemContainer);
		songSelectScreen.items.push(itemContainer);
	}
}
function updateScrollLimits() {
	var totalHeight = songSelectScreen.items.length * (SONG_ITEM_HEIGHT + 50);
	var containerHeight = GAME_HEIGHT - 400;
	maxScrollY = Math.max(0, totalHeight - containerHeight);
}
function showTitleScreen() {
	currentGameState = GAME_STATE_TITLE;
	if (titleScreen.container) {
		titleScreen.container.visible = true;
	}
	if (songSelectScreen.container) {
		songSelectScreen.container.visible = false;
	}
	if (resultsScreen.container) {
		resultsScreen.container.visible = false;
	}
	if (tutorialScreen.container) {
		tutorialScreen.container.visible = false;
	}
	hideGameplayUI();
}
function showSongSelectScreen() {
	currentGameState = GAME_STATE_SONG_SELECT;
	if (titleScreen.container) {
		titleScreen.container.visible = false;
	}
	if (songSelectScreen.container) {
		songSelectScreen.container.visible = true;
	}
	if (resultsScreen.container) {
		resultsScreen.container.visible = false;
	}
	if (tutorialScreen.container) {
		tutorialScreen.container.visible = false;
	}
	songSelectionInProgress = false; // Reset flag when song select screen is shown
	hideGameplayUI();
	songSelectScrollY = 0;
	songSelectScreen.scrollContainer.y = 300;
}
function hideGameplayUI() {
	if (scoreTxt) {
		scoreTxt.visible = false;
	}
	// Zone indicators removed - no longer hiding background zones
	// if (leftZone) {
	//	leftZone.visible = false;
	// }
	// if (rightZone) {
	//	rightZone.visible = false;
	// }
	if (scanner) {
		scanner.visible = false;
	}
	// Also ensure tutorial is hidden if gameplay UI is hidden for other reasons
	if (tutorialScreen.container && currentGameState !== GAME_STATE_TUTORIAL) {
		tutorialScreen.container.visible = false;
	}
}
function showGameplayUI() {
	if (scoreTxt) {
		scoreTxt.visible = true;
	}
	// Zone indicators removed - no longer showing background zones
	// if (leftZone) {
	//	leftZone.visible = true;
	// }
	// if (rightZone) {
	//	rightZone.visible = true;
	// }
	if (scanner) {
		scanner.visible = true;
	}
	if (titleScreen.container) {
		titleScreen.container.visible = false;
	}
	if (songSelectScreen.container) {
		songSelectScreen.container.visible = false;
	}
	if (tutorialScreen.container) {
		tutorialScreen.container.visible = false;
	}
	if (resultsScreen.container) {
		resultsScreen.container.visible = false;
	}
}
function startCountdown() {
	countdownTxt = new Text2('3', {
		size: 200,
		fill: 0xFFFFFF
	});
	countdownTxt.anchor.set(0.5, 0.5);
	countdownTxt.x = GAME_WIDTH / 2;
	countdownTxt.y = GAME_HEIGHT / 2;
	game.addChild(countdownTxt);
	// Start countdown acceleration
	isCountdownActive = true;
	countdownAcceleration = 1;
	var startTime = Date.now();
	var countdownDuration = 4000; // 4 seconds total
	var count = 3;
	var countdownInterval = LK.setInterval(function () {
		count--;
		if (count > 0) {
			countdownTxt.setText(count.toString());
		} else if (count === 0) {
			countdownTxt.setText('GO!');
		} else {
			LK.clearInterval(countdownInterval);
			if (countdownTxt && countdownTxt.destroy) {
				countdownTxt.destroy();
			}
			// Keep the accelerated speed when game starts
			baseParticleSpeed = 5; // Maintain 5x speed
			isCountdownActive = false;
			countdownAcceleration = 1;
			startGame();
		}
	}, 1000);
	// Smooth acceleration during countdown
	var accelerationInterval = LK.setInterval(function () {
		if (!isCountdownActive) {
			LK.clearInterval(accelerationInterval);
			return;
		}
		var elapsed = Date.now() - startTime;
		var progress = Math.min(elapsed / countdownDuration, 1);
		// Smooth acceleration curve - starts slow, ramps up faster
		var easedProgress = progress * progress;
		countdownAcceleration = 1 + easedProgress * 4; // 1x to 5x speed
	}, 50); // Update every 50ms for smooth acceleration
}
function showResultsScreen() {
	currentGameState = GAME_STATE_RESULTS;
	if (titleScreen.container) {
		titleScreen.container.visible = false;
	}
	if (songSelectScreen.container) {
		songSelectScreen.container.visible = false;
	}
	if (resultsScreen.container) {
		resultsScreen.container.visible = true;
	}
	if (tutorialScreen.container) {
		tutorialScreen.container.visible = false;
	}
	hideGameplayUI();
}
function startGame() {
	currentGameState = GAME_STATE_PLAYING;
	songSelectionInProgress = false; // Selection process is complete, game is starting
	gameStarted = true;
	gameStartTime = Date.now();
	showGameplayUI();
	moveScanner();
	// Determine which music to play based on the selected song
	var musicId = 'gameMusic'; // Default music
	if (currentSongData === SongDatabase['Remember This']) {
		musicId = 'rememberThis';
	} else if (currentSongData === SongDatabase['Arcade Heart']) {
		musicId = 'arcadeHeart';
	} else if (currentSongData === SongDatabase['Runner']) {
		musicId = 'runner';
	}
	LK.playMusic(musicId, {
		loop: false
	});
}
function moveScanner() {
	if (!scanner || !gameStarted || currentGameState !== GAME_STATE_PLAYING) {
		return;
	}
	tween.stop(scanner);
	var targetY = scannerIsMovingUp ? SCANNER_Y_MIN : SCANNER_Y_MAX;
	tween(scanner, {
		y: targetY
	}, {
		duration: SCANNER_CYCLE_DURATION / 2,
		easing: tween.linear,
		onFinish: function onFinish() {
			scannerIsMovingUp = !scannerIsMovingUp;
			moveScanner();
		}
	});
}
function spawnNotesForCurrentTime(currentTime) {
	if (!currentSongData) {
		return;
	}
	currentSongData.notes.forEach(function (noteData, index) {
		var noteKey = index + '_' + noteData.time;
		var alreadySpawned = false;
		for (var i = 0; i < spawnedNotes.length; i++) {
			if (spawnedNotes[i] === noteKey) {
				alreadySpawned = true;
				break;
			}
		}
		if (!alreadySpawned && currentTime >= noteData.time - NOTE_SPAWN_AHEAD_MS && currentTime <= noteData.time - NOTE_SPAWN_AHEAD_MS + 100) {
			var calculatedY = calculateNotePosition(noteData.time);
			var calculatedX = calculateZoneX(noteData.zone, calculatedY); // Pass Y position
			var processedNoteData = {
				time: noteData.time,
				type: noteData.type,
				x: calculatedX,
				y: calculatedY,
				color: noteData.color,
				duration: noteData.duration
			};
			var note = new Note(processedNoteData, currentTime);
			notes.push(note);
			game.addChild(note);
			note.spawnIn();
			spawnedNotes.push(noteKey);
		}
	});
}
function setupGame(songName) {
	LK.setScore(0);
	gameStarted = false;
	perfectCount = 0;
	goodCount = 0;
	missCount = 0;
	// Reset particle speed for new game
	baseParticleSpeed = 1;
	isCountdownActive = false;
	countdownAcceleration = 1;
	// Reset particle direction to downward
	globalParticleDirection = {
		x: 0,
		y: 1
	};
	targetParticleDirection = {
		x: 0,
		y: 1
	};
	isChangingDirection = false;
	lastDirectionChangeTime = Date.now();
	nextDirectionChangeDelay = 15000 + Math.random() * 15000;
	if (scoreTxt && scoreTxt.destroy) {
		scoreTxt.destroy();
	}
	scoreTxt = new Text2('0', {
		size: 100,
		fill: 0xFFFFFF
	});
	scoreTxt.anchor.set(0.5, 0);
	LK.gui.top.addChild(scoreTxt);
	scoreTxt.setText(LK.getScore());
	// createZoneIndicators(); // Removed zone indicators from background
	if (scanner && scanner.destroy) {
		scanner.destroy();
	}
	scanner = new Scanner();
	scanner.y = SCANNER_Y_MAX;
	game.addChild(scanner);
	notes.forEach(function (note) {
		if (note && note.destroy) {
			note.destroy();
		}
	});
	notes = [];
	spawnedNotes = [];
	currentSongData = SongDatabase[songName];
	BPM = currentSongData.bpm;
	BEAT_DURATION_MS = 60 / BPM * 1000;
	SCANNER_CYCLE_DURATION = currentSongData.scannerCycleDuration;
	SCANNER_HALF_CYCLE = SCANNER_CYCLE_DURATION / 2;
	scannerIsMovingUp = true;
	startCountdown();
	// Reinitialize particles for proper distribution
	if (backgroundParticles.length === 0) {
		for (var i = 0; i < NUM_BACKGROUND_PARTICLES; i++) {
			var particle = new BackgroundParticle();
			// Let init() handle the positioning
			backgroundParticles.push(particle);
			game.addChildAt(particle, 0);
		}
	} else {
		// Reinitialize existing particles for new distribution
		backgroundParticles.forEach(function (p) {
			p.init(); // init now handles random x and y
		});
	}
}
function checkZoneHit(x, y) {
	var hitZone = x < GAME_WIDTH / 2 ? 'left' : 'right';
	var currentTime = Date.now() - gameStartTime;
	for (var i = notes.length - 1; i >= 0; i--) {
		var note = notes[i];
		if (!note || !note.active || note.isHit || note.isSpawning || !note.noteGraphics) {
			continue;
		}
		if (note.zone === hitZone) {
			var noteCoreHeight = note.noteGraphics.height;
			var noteCenterY = note.y;
			var scannerY = scanner.y;
			var perfectHitRadius = noteCoreHeight * PERFECT_HIT_RATIO / 2;
			var goodHitRadius = noteCoreHeight / 2;
			var perfectHitTop = noteCenterY - perfectHitRadius;
			var perfectHitBottom = noteCenterY + perfectHitRadius;
			var goodHitTop = noteCenterY - goodHitRadius;
			var goodHitBottom = noteCenterY + goodHitRadius;
			var accuracyText = null;
			var hitPoints = 0;
			var popupColor = 0xFFFFFF;
			if (scannerY >= perfectHitTop && scannerY <= perfectHitBottom) {
				accuracyText = "PERFECT";
				popupColor = PERFECT_POPUP_COLOR;
				if (note.type === 'tap') {
					hitPoints = POINTS_PERFECT_TAP;
				} else if (note.type === 'hold') {
					hitPoints = POINTS_PERFECT_HOLD_START;
				}
			} else if (scannerY >= goodHitTop && scannerY <= goodHitBottom) {
				accuracyText = "GOOD";
				popupColor = GOOD_POPUP_COLOR;
				if (note.type === 'tap') {
					hitPoints = POINTS_GOOD_TAP;
				} else if (note.type === 'hold') {
					hitPoints = POINTS_GOOD_HOLD_START;
				}
			}
			if (accuracyText) {
				note.isHit = true;
				showAccuracyPopup(accuracyText, note.x, note.y, popupColor);
				if (accuracyText === "PERFECT") {
					perfectCount++;
				} else if (accuracyText === "GOOD") {
					goodCount++;
				}
				if (note.type === 'tap') {
					note.showHitEffect();
				} else if (note.type === 'hold') {
					note.startHoldEffect();
				}
				if (hitPoints > 0) {
					LK.setScore(LK.getScore() + hitPoints);
					scoreTxt.setText(LK.getScore());
				}
				break;
			}
		}
	}
}
function initializeTutorialScreen() {
	tutorialScreen.container = new Container();
	tutorialScreen.container.visible = false;
	game.addChild(tutorialScreen.container);
	var bg = tutorialScreen.container.attachAsset('tutorialBg', {
		anchorX: 0,
		anchorY: 0
	});
	bg.alpha = 0.9;
	bg.width = GAME_WIDTH;
	bg.height = GAME_HEIGHT;
	var currentY = 80;
	var smallGap = 20;
	var mediumGap = 40;
	var largeGap = 60;
	var textBlockGap = 10;
	var visualOffsetY = 30; // Offset Y for visuals relative to text center
	var visualScale = 0.3;
	var noteVisualXLeft = GAME_WIDTH / 2 - 150;
	var noteVisualXMid = GAME_WIDTH / 2;
	var noteVisualXRight = GAME_WIDTH / 2 + 150;
	// Title
	var title = _createTutorialText("How to Play", 120, currentY, tutorialScreen.container, 0x00FFFF, 'center');
	currentY += title.height + largeGap;
	// Introduction
	var introText = _createTutorialText("The scanner line moves up and down the screen. Notes will appear on the screen; interact with them as the scanner aligns with each note!", 60, currentY, tutorialScreen.container, 0xFFFFFF, 'center');
	currentY += introText.height + mediumGap;
	// Zones & Controls
	var zonesHeader = _createTutorialText("Play Zones & Controls", 80, currentY, tutorialScreen.container, 0xFFFF00, 'center');
	currentY += zonesHeader.height + smallGap;
	var zonesText = _createTutorialText("The screen has a LEFT zone (Blue) and a RIGHT zone (Red). Tap ANYWHERE within the correct zone when a note aligns with the scanner line. You do NOT need to tap the note itself.", 55, currentY, tutorialScreen.container, 0xFFFFFF, 'left');
	currentY += zonesText.height + mediumGap;
	// Tap Notes
	var tapHeader = _createTutorialText("Tap Notes", 80, currentY, tutorialScreen.container, 0xFFFF00, 'center');
	currentY += tapHeader.height + smallGap;
	var tapDesc = _createTutorialText("Tap the zone once when the note aligns with the scanner.", 55, currentY, tutorialScreen.container, 0xFFFFFF, 'left');
	currentY += tapDesc.height + textBlockGap;
	var regularTapHeader = _createTutorialText("- Regular Tap Notes:", 60, currentY, tutorialScreen.container, 0xFFFFFF, 'left');
	currentY += regularTapHeader.height + textBlockGap;
	var leftTapText = _createTutorialText("  Left Zone (Blue): Tap LEFT.", 50, currentY, tutorialScreen.container, 0xFFFFFF, 'left', 150);
	_createTutorialNoteVisual('noteCore', COLOR_LEFT_ZONE, noteVisualXLeft, currentY + visualOffsetY, visualScale, tutorialScreen.container);
	currentY += leftTapText.height + textBlockGap;
	var rightTapText = _createTutorialText("  Right Zone (Red): Tap RIGHT.", 50, currentY, tutorialScreen.container, 0xFFFFFF, 'left', 150);
	_createTutorialNoteVisual('noteCore', COLOR_RIGHT_ZONE, noteVisualXRight, currentY + visualOffsetY, visualScale, tutorialScreen.container);
	currentY += rightTapText.height + mediumGap;
	var syncTapHeader = _createTutorialText("- Synced Tap Notes (Pink):", 60, currentY, tutorialScreen.container, 0xFFFFFF, 'left');
	currentY += syncTapHeader.height + textBlockGap;
	var syncTapText = _createTutorialText("  Appear on both sides. Tap BOTH zones simultaneously.", 50, currentY, tutorialScreen.container, 0xFFFFFF, 'left', 150);
	currentY += syncTapText.height + mediumGap; // Space after text, before visuals
	var scaledVisualHeight = 300 * visualScale; // Assuming noteCore asset height is 300px
	var visualCenterYForTap = currentY + scaledVisualHeight / 2;
	_createTutorialNoteVisual('noteCore', COLOR_SYNC_TAP, noteVisualXLeft, visualCenterYForTap, visualScale, tutorialScreen.container);
	_createTutorialNoteVisual('noteCore', COLOR_SYNC_TAP, noteVisualXRight, visualCenterYForTap, visualScale, tutorialScreen.container);
	currentY += scaledVisualHeight + largeGap; // Space after visuals line
	// Hold Notes
	var holdHeader = _createTutorialText("Hold Notes", 80, currentY, tutorialScreen.container, 0xFFFF00, 'center');
	currentY += holdHeader.height + smallGap;
	var holdDesc = _createTutorialText("Tap and HOLD for the note's trail duration. Release as the trail ends.", 55, currentY, tutorialScreen.container, 0xFFFFFF, 'left');
	currentY += holdDesc.height + textBlockGap;
	var regularHoldHeader = _createTutorialText("- Regular Hold Notes:", 60, currentY, tutorialScreen.container, 0xFFFFFF, 'left');
	currentY += regularHoldHeader.height + textBlockGap;
	var leftHoldText = _createTutorialText("  Left Zone (Blue): Hold LEFT.", 50, currentY, tutorialScreen.container, 0xFFFFFF, 'left', 150);
	_createTutorialNoteVisual('holdNoteCore', COLOR_LEFT_ZONE, noteVisualXLeft, currentY + visualOffsetY, visualScale, tutorialScreen.container);
	currentY += leftHoldText.height + textBlockGap;
	var rightHoldText = _createTutorialText("  Right Zone (Red): Hold RIGHT.", 50, currentY, tutorialScreen.container, 0xFFFFFF, 'left', 150);
	_createTutorialNoteVisual('holdNoteCore', COLOR_RIGHT_ZONE, noteVisualXRight, currentY + visualOffsetY, visualScale, tutorialScreen.container);
	currentY += rightHoldText.height + mediumGap;
	var syncHoldHeader = _createTutorialText("- Synced Hold Notes (Purple):", 60, currentY, tutorialScreen.container, 0xFFFFFF, 'left');
	currentY += syncHoldHeader.height + textBlockGap;
	var syncHoldText = _createTutorialText("  Appear on both sides. Hold BOTH zones simultaneously.", 50, currentY, tutorialScreen.container, 0xFFFFFF, 'left', 150);
	currentY += syncHoldText.height + mediumGap; // Space after text, before visuals
	var scaledVisualHeight = 300 * visualScale; // Assuming holdNoteCore asset height is 300px
	var visualCenterYForHold = currentY + scaledVisualHeight / 2;
	_createTutorialNoteVisual('holdNoteCore', COLOR_SYNC_HOLD, noteVisualXLeft, visualCenterYForHold, visualScale, tutorialScreen.container);
	_createTutorialNoteVisual('holdNoteCore', COLOR_SYNC_HOLD, noteVisualXRight, visualCenterYForHold, visualScale, tutorialScreen.container);
	currentY += scaledVisualHeight + largeGap; // Space after visuals line
	// Close Button
	// Position close button near the bottom, ensure currentY doesn't push it off screen
	var closeButtonY = Math.max(currentY + mediumGap, GAME_HEIGHT - 150);
	tutorialScreen.closeButton = _createTutorialText("Tap to Close", 70, closeButtonY, tutorialScreen.container, 0xCCCCCC, 'center');
	tutorialScreen.closeButton.interactive = true; // For clarity, though handled by game.down
}
function handleSongItemClick(x, y) {
	if (songSelectionInProgress) {
		return true; // Prevent new selections while one is processing
	}
	for (var i = 0; i < songSelectScreen.items.length; i++) {
		var item = songSelectScreen.items[i];
		// Ensure item and item.scale exist before trying to use them for tweening
		if (!item || !item.scale) {
			continue;
		}
		var itemX = item.x;
		var itemY = item.y + songSelectScreen.scrollContainer.y;
		// Check if the click is within the bounds of the current item
		if (x >= itemX && x <= itemX + (GAME_WIDTH - 200) && y >= itemY && y <= itemY + SONG_ITEM_HEIGHT) {
			songSelectionInProgress = true; // Set flag
			// Stop any existing scale tweens on this item and reset scale before pulsing
			tween.stop(item.scale);
			item.scale.set(1.0, 1.0);
			// Pulse animation: scale down (shrink)
			tween(item.scale, {
				x: 0.9,
				y: 0.9
			}, {
				duration: 100,
				// Duration of scale down
				easing: tween.easeOut,
				onFinish: function onFinish() {
					// Pulse animation: scale back to normal
					tween(item.scale, {
						x: 1.0,
						y: 1.0
					}, {
						duration: 100,
						// Duration of scale back to normal
						easing: tween.easeIn,
						onFinish: function onFinish() {
							// Short timeout to allow pulse to be visible before screen change
							LK.setTimeout(function () {
								if (songSelectScreen.container) {
									songSelectScreen.container.visible = false;
								}
								setupGame(item.songName);
								// songSelectionInProgress will be reset by startGame or other screen transitions
							}, 150); // Delay before starting game setup
						}
					});
				}
			});
			return true; // Song clicked and processing started
		}
	}
	return false; // No song item was clicked
}
function initializeResultsScreen() {
	resultsScreen.container = new Container();
	game.addChild(resultsScreen.container);
	resultsScreen.container.visible = false;
	resultsScreen.title = new Text2('Results', {
		size: 180,
		fill: 0xFFFFFF,
		stroke: 0x00FFFF,
		strokeThickness: 6
	});
	resultsScreen.title.anchor.set(0.5, 0.5);
	resultsScreen.title.x = GAME_WIDTH / 2;
	resultsScreen.title.y = GAME_HEIGHT / 2 - 350;
	resultsScreen.container.addChild(resultsScreen.title);
	resultsScreen.scoreText = new Text2('Final Score: 0', {
		size: 100,
		fill: 0xFFFFFF
	});
	resultsScreen.scoreText.anchor.set(0.5, 0.5);
	resultsScreen.scoreText.x = GAME_WIDTH / 2;
	resultsScreen.scoreText.y = GAME_HEIGHT / 2 - 150;
	resultsScreen.container.addChild(resultsScreen.scoreText);
	resultsScreen.highScoreText = new Text2('High Score: 0', {
		size: 80,
		fill: 0xFFDD00
	});
	resultsScreen.highScoreText.anchor.set(0.5, 0.5);
	resultsScreen.highScoreText.x = GAME_WIDTH / 2;
	resultsScreen.highScoreText.y = GAME_HEIGHT / 2 - 50;
	resultsScreen.container.addChild(resultsScreen.highScoreText);
	resultsScreen.perfectText = new Text2('Perfect: 0', {
		size: 70,
		fill: 0x00FF00
	});
	resultsScreen.perfectText.anchor.set(0.5, 0.5);
	resultsScreen.perfectText.x = GAME_WIDTH / 2;
	resultsScreen.perfectText.y = GAME_HEIGHT / 2 + 50;
	resultsScreen.container.addChild(resultsScreen.perfectText);
	resultsScreen.goodText = new Text2('Good: 0', {
		size: 70,
		fill: 0xFFFF00
	});
	resultsScreen.goodText.anchor.set(0.5, 0.5);
	resultsScreen.goodText.x = GAME_WIDTH / 2;
	resultsScreen.goodText.y = GAME_HEIGHT / 2 + 130;
	resultsScreen.container.addChild(resultsScreen.goodText);
	resultsScreen.missText = new Text2('Miss: 0', {
		size: 70,
		fill: 0xFF0000
	});
	resultsScreen.missText.anchor.set(0.5, 0.5);
	resultsScreen.missText.x = GAME_WIDTH / 2;
	resultsScreen.missText.y = GAME_HEIGHT / 2 + 210;
	resultsScreen.container.addChild(resultsScreen.missText);
	resultsScreen.continueText = new Text2('Tap to Continue', {
		size: 90,
		fill: 0xCCCCCC
	});
	resultsScreen.continueText.anchor.set(0.5, 0.5);
	resultsScreen.continueText.x = GAME_WIDTH / 2;
	resultsScreen.continueText.y = GAME_HEIGHT / 2 + 430;
	resultsScreen.container.addChild(resultsScreen.continueText);
	if (resultsScreen.pulseInterval) {
		LK.clearInterval(resultsScreen.pulseInterval);
	}
	resultsScreen.pulseInterval = LK.setInterval(function () {
		if (currentGameState === GAME_STATE_RESULTS && resultsScreen.continueText) {
			var pulseScale = resultsScreen.continueText.scale.x;
			var pulseDirection = resultsScreen.continueText.pulseDirection || 1;
			pulseScale += pulseDirection * 0.02;
			if (pulseScale > 1.1) {
				pulseScale = 1.1;
				pulseDirection = -1;
			} else if (pulseScale < 0.9) {
				pulseScale = 0.9;
				pulseDirection = 1;
			}
			resultsScreen.continueText.scale.set(pulseScale);
			resultsScreen.continueText.pulseDirection = pulseDirection;
		}
	}, 50);
}
function showTutorialScreen() {
	currentGameState = GAME_STATE_TUTORIAL;
	if (titleScreen.container) {
		titleScreen.container.visible = false;
	}
	if (songSelectScreen.container) {
		songSelectScreen.container.visible = false;
	}
	if (resultsScreen.container) {
		resultsScreen.container.visible = false;
	}
	if (tutorialScreen.container) {
		tutorialScreen.container.visible = true;
	}
	hideGameplayUI();
}
initializeTitleScreen();
initializeSongSelectScreen();
initializeResultsScreen();
initializeTutorialScreen(); // Initialize the new tutorial screen
for (var i = 0; i < NUM_BACKGROUND_PARTICLES; i++) {
	var particle = new BackgroundParticle();
	particle.y = Math.random() * GAME_HEIGHT;
	backgroundParticles.push(particle);
	game.addChildAt(particle, 0);
}
showTitleScreen();
game.down = function (x, y, obj) {
	if (currentGameState === GAME_STATE_TITLE) {
		showSongSelectScreen();
		return;
	}
	if (currentGameState === GAME_STATE_TUTORIAL) {
		// Check click on tutorial's close button (entire screen acts as close for simplicity)
		// More precise check if tutorialScreen.closeButton was an actual button object with bounds:
		// var cb = tutorialScreen.closeButton;
		// if (x >= cb.x - cb.width * cb.anchor.x && x <= cb.x + cb.width * (1-cb.anchor.x) &&
		//     y >= cb.y - cb.height * cb.anchor.y && y <= cb.y + cb.height * (1-cb.anchor.y)) {
		showSongSelectScreen();
		// }
		return;
	}
	if (currentGameState === GAME_STATE_RESULTS) {
		showSongSelectScreen();
		return;
	}
	if (currentGameState === GAME_STATE_SONG_SELECT) {
		// Check for tutorial button click
		var tb = songSelectScreen.tutorialButton;
		if (tb && x >= tb.x - tb.width * tb.anchor.x && x <= tb.x + tb.width * (1 - tb.anchor.x) && y >= tb.y - tb.height && y <= tb.y) {
			// anchor is 0.5, 1
			showTutorialScreen();
			return;
		}
		if (handleSongItemClick(x, y)) {
			return;
		}
		isDraggingSongList = true;
		dragStartYSongList = y;
		return;
	}
	if (currentGameState === GAME_STATE_PLAYING && gameStarted) {
		checkZoneHit(x, y);
		var hitZoneForDown = x < GAME_WIDTH / 2 ? 'left' : 'right';
		for (var i = 0; i < notes.length; i++) {
			var note = notes[i];
			if (!note.active || note.isSpawning || note.holdSuccessfullyCompleted || note.isMissed) {
				continue;
			}
			if (note.zone === hitZoneForDown && note.isHit) {
				if (note.type === 'hold' && !note.isHolding) {
					note.isHolding = true;
					activeHoldNotes[note.zone] = note;
				}
			}
		}
		isDragging = true;
		dragStartX = x;
		dragStartY = y;
	}
};
game.move = function (x, y, obj) {
	if (currentGameState === GAME_STATE_SONG_SELECT && isDraggingSongList) {
		var deltaY = y - dragStartYSongList;
		songSelectScrollY = Math.max(0, Math.min(maxScrollY, songSelectScrollY - deltaY));
		songSelectScreen.scrollContainer.y = 300 - songSelectScrollY;
		dragStartYSongList = y;
	}
	if (currentGameState === GAME_STATE_PLAYING && isDragging && gameStarted) {}
};
game.up = function (x, y, obj) {
	if (currentGameState === GAME_STATE_SONG_SELECT) {
		isDraggingSongList = false;
		return;
	}
	if (currentGameState === GAME_STATE_PLAYING && gameStarted) {
		var releasedZone = x < GAME_WIDTH / 2 ? 'left' : 'right';
		var heldNote = activeHoldNotes[releasedZone];
		if (heldNote && heldNote.isHolding) {
			heldNote.isHolding = false;
			delete activeHoldNotes[releasedZone];
			var currentTimeMs = Date.now() - gameStartTime;
			var noteExpectedEndTimeMs = heldNote.hitTime + heldNote.duration;
			var absoluteEndNoteY = heldNote.y + (heldNote.endNote ? heldNote.endNote.y : 0);
			var hitTimeCycle = heldNote.hitTime % SCANNER_CYCLE_DURATION;
			var noteScannerMovingUp = hitTimeCycle < SCANNER_HALF_CYCLE;
			var trailDirection = noteScannerMovingUp ? -1 : 1;
			var scannerAtEnd;
			if (trailDirection === -1) {
				scannerAtEnd = scanner.y <= absoluteEndNoteY + HIT_TOLERANCE_PX_FOR_HOLD_END && scanner.y >= absoluteEndNoteY - HIT_TOLERANCE_PX_FOR_HOLD_END / 2;
			} else {
				scannerAtEnd = scanner.y >= absoluteEndNoteY - HIT_TOLERANCE_PX_FOR_HOLD_END && scanner.y <= absoluteEndNoteY + HIT_TOLERANCE_PX_FOR_HOLD_END / 2;
			}
			var timeReachedOrPassedEnd = currentTimeMs >= noteExpectedEndTimeMs - HOLD_END_GRACE_PERIOD_MS;
			var timeNotTooLate = currentTimeMs <= noteExpectedEndTimeMs + HOLD_END_GRACE_PERIOD_MS + 200;
			if (scannerAtEnd && timeReachedOrPassedEnd && timeNotTooLate) {
				heldNote.completeHold();
				LK.setScore(LK.getScore() + 50);
				scoreTxt.setText(LK.getScore());
			} else {
				heldNote.failHold();
				missCount++;
			}
		}
		isDragging = false;
	}
};
game.update = function () {
	// Update background particles with new space travel effects
	backgroundParticles.forEach(function (particle) {
		particle.updateParticle();
	});
	// Handle direction changes during gameplay
	if (currentGameState === GAME_STATE_PLAYING && gameStarted && !isCountdownActive) {
		var currentTimeForDirectionChange = Date.now();
		if (currentTimeForDirectionChange - lastDirectionChangeTime > nextDirectionChangeDelay) {
			changeParticleDirection();
		}
	}
	// Handle global particle direction changes (original code)
	var currentTime = Date.now();
	// This part is now handled by the block above for GAME_STATE_PLAYING
	// and the general update below might be redundant or could be simplified if only for non-playing states
	// For now, let's keep the existing logic structure for non-playing state direction changes or initial setup
	if (!isChangingDirection && currentGameState !== GAME_STATE_PLAYING && currentTime - lastDirectionChangeTime > nextDirectionChangeDelay) {
		changeParticleDirection(); // Call the unified function
	}
	// The following block for `if (isChangingDirection)` is now handled by `getCurrentParticleDirection`
	// which is called by `particle.updateParticle()`.
	// So, the direct manipulation of `globalParticleDirection` here might be redundant
	// if particles are always updating based on `getCurrentParticleDirection`.
	// However, `changeParticleDirection` sets `isChangingDirection = true` and `directionChangeStartTime`.
	// `getCurrentParticleDirection` uses these to interpolate and then resets `isChangingDirection`.
	// The logic seems okay as `getCurrentParticleDirection` will handle the smooth transition.
	if (currentGameState !== GAME_STATE_PLAYING || !gameStarted) {
		return;
	}
	var currentTime = Date.now() - gameStartTime;
	spawnNotesForCurrentTime(currentTime);
	for (var i = notes.length - 1; i >= 0; i--) {
		var note = notes[i];
		if (!note) {
			notes.splice(i, 1);
			continue;
		}
		if (note.type === 'hold' && note.isHolding && note.active && !note.holdSuccessfullyCompleted && !note.isMissed) {
			note.updateHoldEffects(scanner.y);
			var currentTimeMsForUpdate = Date.now() - gameStartTime;
			var noteExpectedEndTimeMsForUpdate = note.hitTime + note.duration;
			if (currentTimeMsForUpdate > noteExpectedEndTimeMsForUpdate + HOLD_END_GRACE_PERIOD_MS + 500) {
				if (activeHoldNotes[note.zone] === note) {
					note.failHold();
					delete activeHoldNotes[note.zone];
					missCount++;
				}
			}
		}
		if (note.active && !note.isHit && !note.isMissed && !note.isSpawning) {
			var timeDiff = currentTime - note.hitTime;
			var scannerPassed = false;
			if (scannerIsMovingUp && scanner.y < note.y - 50) {
				scannerPassed = true;
			} else if (!scannerIsMovingUp && scanner.y > note.y + 50) {
				scannerPassed = true;
			}
			if (scannerPassed && timeDiff > 300) {
				note.isMissed = true;
				note.showMissEffect();
				missCount++;
			}
		}
		if (!note.active) {
			notes.splice(i, 1);
			if (game.children.indexOf(note) > -1) {
				game.removeChild(note);
			}
			if (note.destroy) {
				note.destroy();
			}
		}
	}
	if (currentSongData && currentTime > currentSongData.totalLength + 500 && currentGameState === GAME_STATE_PLAYING) {
		LK.stopMusic();
		gameStarted = false;
		if (scanner) {
			tween.stop(scanner);
		}
		var finalScore = LK.getScore();
		// --- Letter Grade Calculation (MOVED HERE) ---
		var totalNotes = 0;
		if (currentSongData && currentSongData.notes) {
			totalNotes = currentSongData.notes.length;
		}
		var grade = "C";
		if (totalNotes > 0) {
			if (missCount === 0 && perfectCount === totalNotes) {
				grade = "S";
			} else {
				var hitCount = perfectCount + goodCount;
				var ratio = hitCount / totalNotes;
				if (ratio >= 0.95) {
					grade = "A";
				} else if (ratio >= 0.80) {
					grade = "B";
				} else {
					grade = "C";
				}
			}
		} else {
			grade = "-";
		}
		var songName = null;
		for (var key in SongDatabase) {
			if (SongDatabase[key] === currentSongData) {
				songName = key;
				break;
			}
		}
		if (songName) {
			var wasUpdated = updateHighScore(songName, finalScore, grade); // Now grade is available
			if (wasUpdated) {
				// Update songSelectScreen items if they are already created
				if (songSelectScreen.items) {
					for (var j = 0; j < songSelectScreen.items.length; j++) {
						var item = songSelectScreen.items[j];
						if (item.songName === songName) {
							// Assuming scoreText is the 4th child (index 3)
							var scoreTextDisplay = item.children[3];
							if (scoreTextDisplay && scoreTextDisplay.setText) {
								var gradeDisplay = SongDatabase[songName].highestGrade || 'C';
								scoreTextDisplay.setText('High Score: ' + SongDatabase[songName].highScore + ' | Grade: ' + gradeDisplay);
							}
							break;
						}
					}
				}
			}
			if (resultsScreen.highScoreText) {
				resultsScreen.highScoreText.setText("High Score: " + SongDatabase[songName].highScore);
			}
		}
		if (resultsScreen.scoreText) {
			resultsScreen.scoreText.setText("Final Score: " + finalScore);
		}
		if (resultsScreen.perfectText) {
			resultsScreen.perfectText.setText("Perfect: " + perfectCount);
		}
		if (resultsScreen.goodText) {
			resultsScreen.goodText.setText("Good: " + goodCount);
		}
		if (resultsScreen.missText) {
			resultsScreen.missText.setText("Miss: " + missCount);
		}
		if (!resultsScreen.gradeText) {
			resultsScreen.gradeText = new Text2('Grade: ' + grade, {
				size: 120,
				fill: 0x00FFFF
			});
			resultsScreen.gradeText.anchor.set(0.5, 0.5);
			resultsScreen.gradeText.x = GAME_WIDTH / 2;
			resultsScreen.gradeText.y = GAME_HEIGHT / 2 + 280;
			resultsScreen.container.addChild(resultsScreen.gradeText);
		} else {
			resultsScreen.gradeText.setText('Grade: ' + grade);
			resultsScreen.gradeText.visible = true;
		}
		showResultsScreen();
	}
	if (scanner && game.children.indexOf(scanner) > -1) {
		game.removeChild(scanner);
		game.addChild(scanner);
	}
};

===================================================================
--- original.js
+++ change.js
@@ -283,12 +283,10 @@
 			alpha: 1,
 			scaleX: 1,
 			scaleY: 1
 		}, {
-			duration: 700,
-			// Adjusted duration for a more pronounced elastic effect
-			easing: tween.elasticOut,
-			// Use elastic easing
+			duration: 500,
+			easing: tween.easeOut,
 			onFinish: function onFinish() {
 				self.isSpawning = false;
 				self._initiateBeatPulseLoop();
 			}
@@ -330,55 +328,24 @@
 	};
 	self.showMissEffect = function () {
 		self._clearBeatPulseLoop();
 		LK.getSound('missSound').play();
-		// Stop any ongoing spawn or other animations on the note itself
-		tween.stop(self);
-		// Tint the note graphics red quickly
-		if (self.noteGraphics) {
-			tween(self.noteGraphics, {
-				tint: 0xff0000
-			}, {
-				duration: 100,
-				// Quick tint
-				onFinish: function onFinish() {
-					// After tinting, start the reverse spawn animation on the note container
-					tween(self, {
-						alpha: 0,
-						scaleX: 0.1,
-						// Initial spawn scale
-						scaleY: 0.1 // Initial spawn scale
-					}, {
-						duration: 500,
-						// Duration for the reverse animation
-						easing: tween.elasticIn,
-						// Reverse of elasticOut or similar
-						onFinish: function onFinish() {
-							self.active = false;
-							self._clearBeatPulseLoop();
-							// Optionally, reset tint if note might be reused, though destroy is typical
-							// if (self.noteGraphics) {
-							//     self.noteGraphics.tint = self.color;
-							// }
-						}
-					});
-				}
-			});
-		} else {
-			// Fallback if noteGraphics is somehow not available
-			tween(self, {
-				alpha: 0,
-				scaleX: 0.1,
-				scaleY: 0.1
-			}, {
-				duration: 500,
-				easing: tween.elasticIn,
-				onFinish: function onFinish() {
-					self.active = false;
-					self._clearBeatPulseLoop();
-				}
-			});
-		}
+		tween(self.noteGraphics, {
+			tint: 0xff0000
+		}, {
+			duration: 150,
+			onFinish: function onFinish() {
+				tween(self, {
+					alpha: 0.3
+				}, {
+					duration: 300,
+					onFinish: function onFinish() {
+						self.active = false;
+						self._clearBeatPulseLoop();
+					}
+				});
+			}
+		});
 	};
 	self.explodeIntoParticles = function () {
 		var noteScale = 1.2; // Base scale relative to noteCore (300px)
 		// Stage 1: Initial Flash (0-200ms)
@@ -1047,9 +1014,9 @@
 var isDragging = false;
 var dragStartX, dragStartY;
 var currentTrail = [];
 var backgroundParticles = [];
-var NUM_BACKGROUND_PARTICLES = 100;
+var NUM_BACKGROUND_PARTICLES = 150;
 var titleScreen = {};
 var songSelectScreen = {};
 var songSelectScrollY = 0;
 var maxScrollY = 0;
@@ -1095,12 +1062,16 @@
 	};
 }
 // Function to initiate a direction change
 function changeParticleDirection() {
-	if (isChangingDirection) return; // Already changing
+	if (isChangingDirection) {
+		return;
+	} // Already changing
 	// Generate a new direction 45-90 degrees from current
 	var angleChange = Math.PI / 4 + Math.random() * (Math.PI / 4); // 45-90 degrees
-	if (Math.random() < 0.5) angleChange = -angleChange; // Random direction
+	if (Math.random() < 0.5) {
+		angleChange = -angleChange;
+	} // Random direction
 	var currentAngle = Math.atan2(globalParticleDirection.y, globalParticleDirection.x);
 	var newAngle = currentAngle + angleChange;
 	targetParticleDirection.x = Math.cos(newAngle);
 	targetParticleDirection.y = Math.sin(newAngle);