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

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 36;
	self.targetX = 0;
	self.targetY = 0;
	self.directionX = 0;
	self.directionY = 0;
	self.update = function () {
		self.x += self.directionX * self.speed;
		self.y += self.directionY * self.speed;
	};
	return self;
});
var Note = Container.expand(function () {
	var self = Container.call(this);
	// Default note type
	self.noteType = 'normal';
	self.pointValue = 100;
	self.speed = 3;
	// Initialize with normal note graphics
	var noteGraphics = self.attachAsset('note', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.graphics = noteGraphics;
	self.lane = 0;
	self.hasTriggered = false;
	self.pulseTimer = 0;
	// Method to set note type with different properties
	self.setNoteType = function (type) {
		self.noteType = type;
		// Remove current graphics
		self.removeChild(self.graphics);
		switch (type) {
			case 'fast':
				self.graphics = self.attachAsset('noteRed', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 5;
				self.pointValue = 150;
				break;
			case 'slow':
				self.graphics = self.attachAsset('noteBlue', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 1.5;
				self.pointValue = 200;
				break;
			case 'bonus':
				self.graphics = self.attachAsset('noteGold', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 2.5;
				self.pointValue = 300;
				break;
			case 'challenge':
				self.graphics = self.attachAsset('notePurple', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 4;
				self.pointValue = 250;
				break;
			case 'multiShot':
				self.graphics = self.attachAsset('powerUpGreen', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 2;
				self.pointValue = 150;
				break;
			case 'slowMotion':
				self.graphics = self.attachAsset('powerUpGreen', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 2;
				self.pointValue = 150;
				break;
			case 'scoreMultiplier':
				self.graphics = self.attachAsset('powerUpGreen', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 2;
				self.pointValue = 150;
				break;
			case 'movingTarget':
				self.graphics = self.attachAsset('powerUpRed', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 2;
				self.pointValue = 100;
				break;
			case 'laserBeam':
				self.graphics = self.attachAsset('powerUpBlue', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 2;
				self.pointValue = 200;
				break;
			case 'shield':
				self.graphics = self.attachAsset('powerUpBlue', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 2;
				self.pointValue = 150;
				break;
			case 'noteDestroyer':
				self.graphics = self.attachAsset('powerUpBlue', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 2;
				self.pointValue = 300;
				break;
			default:
				self.graphics = self.attachAsset('note', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.speed = 3;
				self.pointValue = 100;
		}
	};
	self.update = function () {
		self.y += self.speed;
		// Add visual effects for special notes
		if (self.noteType === 'bonus') {
			// Golden notes pulse
			self.pulseTimer++;
			var scale = 1 + Math.sin(self.pulseTimer * 0.2) * 0.1;
			self.graphics.scaleX = scale;
			self.graphics.scaleY = scale;
		} else if (self.noteType === 'challenge') {
			// Purple notes rotate
			self.graphics.rotation += 0.05;
		} else if (self.noteType === 'multiShot' || self.noteType === 'slowMotion' || self.noteType === 'scoreMultiplier') {
			// Good power-ups glow green
			self.pulseTimer++;
			var scale = 1 + Math.sin(self.pulseTimer * 0.3) * 0.15;
			self.graphics.scaleX = scale;
			self.graphics.scaleY = scale;
		} else if (self.noteType === 'laserBeam' || self.noteType === 'shield' || self.noteType === 'noteDestroyer') {
			// New power-ups glow blue
			self.pulseTimer++;
			var scale = 1 + Math.sin(self.pulseTimer * 0.35) * 0.18;
			self.graphics.scaleX = scale;
			self.graphics.scaleY = scale;
		} else if (self.noteType === 'movingTarget') {
			// Bad power-up pulses red
			self.pulseTimer++;
			var scale = 1 + Math.sin(self.pulseTimer * 0.4) * 0.2;
			self.graphics.scaleX = scale;
			self.graphics.scaleY = scale;
		}
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add floating gun
	var gun = self.attachAsset('gun', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -50
	});
	self.gun = gun;
	// Method to rotate gun towards target with smooth animation
	self.aimGunAt = function (targetX, targetY) {
		var dx = targetX - self.x;
		var dy = targetY - (self.y - 50); // Account for gun offset
		var targetRotation = Math.atan2(dy, dx);
		// Smooth rotation animation
		tween(self.gun, {
			rotation: targetRotation
		}, {
			duration: 150,
			easing: tween.easeOut
		});
	};
	return self;
});
var Spike = Container.expand(function () {
	var self = Container.call(this);
	var spikeGraphics = self.attachAsset('spike', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6.0;
	self.lane = 0;
	self.pulseTimer = 0;
	self.update = function () {
		self.y += self.speed;
		// Add pulsing danger effect
		self.pulseTimer++;
		var scale = 1 + Math.sin(self.pulseTimer * 0.4) * 0.2;
		spikeGraphics.scaleX = scale;
		spikeGraphics.scaleY = scale;
		// Add rotation for more menacing look
		spikeGraphics.rotation += 0.08;
	};
	return self;
});
var TargetBox = Container.expand(function () {
	var self = Container.call(this);
	var targetGraphics = self.attachAsset('targetBox', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.lane = 0;
	self.isActive = false;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xF0F8FF
});

/**** 
* Game Code
****/ 
// Game variables
var player;
var bullets = [];
var notes = [];
var spikes = [];
var targetBoxes = [];
var staffLines = [];
var score = 0;
// Level system variables
var currentLevel = storage.currentLevel || 1;
var levelScore = storage.levelScore || 0; // Score accumulated in current level
var totalScore = storage.totalScore || 0; // Total score across all levels
var levelThresholds = [0, 1000, 2500, 5000, 8000, 12000, 17000, 23000, 30000, 38000, 47000, 57000, 68000, 80000, 93000, 107000, 122000, 138000, 155000, 173000]; // Score needed for each level
var maxLevel = levelThresholds.length;
var mouseX = 1024;
var noteSpawnTimer = 0;
var noteSpawnInterval = 90; // frames between note spawns
var spikeSpawnTimer = 0;
var spikeSpawnInterval = 300; // frames between spike spawns (much less frequent than notes)
var musicPlaying = false;
var musicGlitchTimer = 0;
var musicGlitchDuration = 18; // 0.3 seconds at 60fps
// Music selection variables
var currentMusicTrack = 'bgmusic';
var musicTracks = ['bgmusic', 'rock_track', 'electronic_track'];
var musicTrackNames = ['Original', 'Music 2', 'Music 3'];
var musicSelectionMenu = [];
var showMusicMenu = false;
// Note preview system
var previewNotes = [];
var nextNoteTypes = [];
// Combo system variables
var combo = 0;
var maxCombo = 0;
// Feedback text variables
var feedbackTexts = [];
// Power-up system variables
var multiShotActive = false;
var multiShotTimer = 0;
var multiShotDuration = 300; // 5 seconds at 60fps
var slowMotionActive = false;
var slowMotionTimer = 0;
var slowMotionDuration = 300; // 5 seconds at 60fps
var scoreMultiplierActive = false;
var scoreMultiplierTimer = 0;
var scoreMultiplierDuration = 300; // 5 seconds at 60fps
var movingTargetActive = false;
var movingTargetTimer = 0;
var movingTargetDuration = 240; // 4 seconds at 60fps
// Power-up display variables
var powerUpDisplayContainer;
var powerUpIconDisplay;
var powerUpNameDisplay;
var powerUpTimerDisplay;
var powerUpProgressBar;
var activePowerUpType = null;
var activePowerUpMaxDuration = 0;
// New power-up system variables
var laserBeamActive = false;
var laserBeamTimer = 0;
var laserBeamDuration = 180; // 3 seconds at 60fps
var laserBeamGraphics = null;
var shieldActive = false;
var shieldHits = 0;
var maxShieldHits = 1;
var shieldGraphics = null;
var noteDestroyerActive = false;
var noteDestroyerTimer = 0;
var noteDestroyerDuration = 1; // Instant effect, 1 frame duration
// Setup staff lines
var staffY = 400;
var staffSpacing = 80;
for (var i = 0; i < 5; i++) {
	var staffLine = game.addChild(LK.getAsset('staffLine', {
		anchorX: 0,
		anchorY: 0.5,
		x: 0,
		y: staffY + i * staffSpacing
	}));
	staffLines.push(staffLine);
}
// Setup note preview indicators
var targetBoxPositions = [512, 853, 1194, 1536];
for (var i = 0; i < 4; i++) {
	var previewNote = LK.getAsset('note', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.0,
		scaleY: 1.0,
		alpha: 0.8,
		x: targetBoxPositions[i],
		y: staffY - 100
	});
	previewNote.visible = false;
	game.addChild(previewNote);
	previewNotes.push(previewNote);
	nextNoteTypes.push(null);
}
// Setup target boxes
var targetY = staffY + 4 * staffSpacing + 120;
var targetBoxPositions = [512, 853, 1194, 1536]; // 4 evenly spaced positions
for (var i = 0; i < 4; i++) {
	var targetBox = game.addChild(new TargetBox());
	targetBox.x = targetBoxPositions[i];
	targetBox.y = targetY;
	targetBox.lane = i;
	targetBoxes.push(targetBox);
}
// Setup deletion area below target boxes
var deletionAreaY = targetY + 200;
// Initialize level system
updateLevelDisplay();
increaseDifficultyForLevel();
// Create visible secret wall
var secretWall = game.addChild(LK.getAsset('secretWall', {
	anchorX: 0,
	anchorY: 0.5,
	x: 0,
	y: deletionAreaY
}));
// Setup player
player = game.addChild(new Player());
player.x = 1024;
player.y = 2500;
// Create aim assistance line
var aimLine = LK.getAsset('staffLine', {
	anchorX: 0,
	anchorY: 0.5,
	width: 2,
	height: 2,
	alpha: 0.3,
	tint: 0xFF0000
});
game.addChild(aimLine);
// Setup score display
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0x000000
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Setup level display
var levelTxt = new Text2('Level: ' + currentLevel, {
	size: 60,
	fill: 0x0066CC
});
levelTxt.anchor.set(0, 0);
levelTxt.x = 20;
levelTxt.y = 20;
LK.gui.topLeft.addChild(levelTxt);
// Setup level progress display
var levelProgressTxt = new Text2('', {
	size: 45,
	fill: 0x666666
});
levelProgressTxt.anchor.set(0, 0);
levelProgressTxt.x = 20;
levelProgressTxt.y = 90;
LK.gui.topLeft.addChild(levelProgressTxt);
// Setup combo display
var comboTxt = new Text2('', {
	size: 60,
	fill: 0xFF6600
});
comboTxt.anchor.set(0.5, 0);
comboTxt.y = 90; // Position below score
LK.gui.top.addChild(comboTxt);
// Setup music selection button
var musicMenuBtn = new Text2('Music: ' + musicTrackNames[0], {
	size: 50,
	fill: 0x000000
});
musicMenuBtn.anchor.set(1, 0);
musicMenuBtn.x = -20; // Position from right edge
musicMenuBtn.y = 20;
LK.gui.topRight.addChild(musicMenuBtn);
// Add help text below music button
var musicHelpTxt = new Text2('You can change the music! For "Music 2" Press \'Original\'\nFor the "Music 3" Press \'Music 2\'', {
	size: 35,
	fill: 0x666666
});
musicHelpTxt.anchor.set(1, 0);
musicHelpTxt.x = -20;
musicHelpTxt.y = 80;
LK.gui.topRight.addChild(musicHelpTxt);
// Create music selection menu (initially hidden)
for (var i = 0; i < musicTracks.length; i++) {
	var menuItem = new Text2(musicTrackNames[i], {
		size: 45,
		fill: 0x000000
	});
	menuItem.anchor.set(1, 0);
	menuItem.x = -20;
	menuItem.y = 80 + i * 60;
	menuItem.alpha = 0;
	menuItem.trackIndex = i;
	LK.gui.topRight.addChild(menuItem);
	musicSelectionMenu.push(menuItem);
}
// Create power-up display container on left side of screen
powerUpDisplayContainer = new Container();
powerUpDisplayContainer.x = 50;
powerUpDisplayContainer.y = 200;
powerUpDisplayContainer.alpha = 0;
LK.gui.left.addChild(powerUpDisplayContainer);
// Power-up icon display
powerUpIconDisplay = LK.getAsset('powerUpGreen', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 0.8,
	scaleY: 0.8
});
powerUpIconDisplay.x = 40;
powerUpIconDisplay.y = 40;
powerUpDisplayContainer.addChild(powerUpIconDisplay);
// Power-up name text
powerUpNameDisplay = new Text2('', {
	size: 40,
	fill: 0x00FF00
});
powerUpNameDisplay.anchor.set(0, 0.5);
powerUpNameDisplay.x = 90;
powerUpNameDisplay.y = 25;
powerUpDisplayContainer.addChild(powerUpNameDisplay);
// Power-up timer text
powerUpTimerDisplay = new Text2('', {
	size: 30,
	fill: 0xFFFFFF
});
powerUpTimerDisplay.anchor.set(0, 0.5);
powerUpTimerDisplay.x = 90;
powerUpTimerDisplay.y = 55;
powerUpDisplayContainer.addChild(powerUpTimerDisplay);
// Power-up progress bar background
var progressBarBg = LK.getAsset('staffLine', {
	anchorX: 0,
	anchorY: 0.5,
	width: 200,
	height: 8,
	tint: 0x333333
});
progressBarBg.x = 90;
progressBarBg.y = 75;
powerUpDisplayContainer.addChild(progressBarBg);
// Power-up progress bar fill
powerUpProgressBar = LK.getAsset('staffLine', {
	anchorX: 0,
	anchorY: 0.5,
	width: 200,
	height: 8,
	tint: 0x00FF00
});
powerUpProgressBar.x = 90;
powerUpProgressBar.y = 75;
powerUpDisplayContainer.addChild(powerUpProgressBar);
// Input handling
game.move = function (x, y, obj) {
	mouseX = x;
	player.x = x;
	// Continuously aim gun at mouse position
	player.aimGunAt(x, y);
	// Update aim line
	var gunX = player.x;
	var gunY = player.y - 50;
	var dx = x - gunX;
	var dy = y - gunY;
	var distance = Math.sqrt(dx * dx + dy * dy);
	aimLine.x = gunX;
	aimLine.y = gunY;
	aimLine.width = Math.min(distance, 300); // Limit line length
	aimLine.rotation = Math.atan2(dy, dx);
};
game.down = function (x, y, obj) {
	// Check if clicking on music menu button - use simpler coordinate check
	if (x > 1600 && y < 80) {
		// Toggle music menu
		showMusicMenu = !showMusicMenu;
		for (var i = 0; i < musicSelectionMenu.length; i++) {
			var menuItem = musicSelectionMenu[i];
			if (showMusicMenu) {
				tween(menuItem, {
					alpha: 1
				}, {
					duration: 200,
					easing: tween.easeOut
				});
			} else {
				tween(menuItem, {
					alpha: 0
				}, {
					duration: 200,
					easing: tween.easeIn
				});
			}
		}
		return; // Don't shoot when clicking menu
	}
	// Check if clicking on menu items
	if (showMusicMenu) {
		for (var i = 0; i < musicSelectionMenu.length; i++) {
			var menuItem = musicSelectionMenu[i];
			// Check if clicking in the menu area for this item
			if (x > 1600 && y > 80 + i * 60 && y < 130 + i * 60) {
				// Select this music track - directly use the menu item's trackIndex
				var selectedTrackIndex = menuItem.trackIndex;
				currentMusicTrack = musicTracks[selectedTrackIndex];
				musicMenuBtn.setText('Music: ' + musicTrackNames[selectedTrackIndex]);
				// Stop current music and play new track
				LK.stopMusic();
				try {
					LK.playMusic(currentMusicTrack);
					musicPlaying = true;
				} catch (e) {
					console.log('Error playing music:', currentMusicTrack, 'at index', selectedTrackIndex);
					musicPlaying = false;
				}
				// Hide menu
				showMusicMenu = false;
				for (var j = 0; j < musicSelectionMenu.length; j++) {
					tween(musicSelectionMenu[j], {
						alpha: 0
					}, {
						duration: 200,
						easing: tween.easeIn
					});
				}
				return; // Don't shoot when selecting music
			}
		}
	}
	// Aim gun at target position
	player.aimGunAt(x, y);
	if (multiShotActive) {
		// Create 3 bullets in spread pattern
		for (var i = 0; i < 3; i++) {
			var bullet = game.addChild(new Bullet());
			bullet.x = player.x;
			bullet.y = player.y - 50; // Spawn from gun position
			// Calculate direction to mouse position with spread
			var dx = x - player.x;
			var dy = y - (player.y - 50); // Account for gun offset
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > 0) {
				var angle = Math.atan2(dy, dx);
				var spreadAngle = (i - 1) * 0.3; // -0.3, 0, 0.3 radians spread
				bullet.directionX = Math.cos(angle + spreadAngle);
				bullet.directionY = Math.sin(angle + spreadAngle);
			}
			bullets.push(bullet);
		}
	} else {
		// Create single bullet from gun position
		var bullet = game.addChild(new Bullet());
		bullet.x = player.x;
		bullet.y = player.y - 50; // Spawn from gun position
		// Calculate direction to mouse position
		var dx = x - player.x;
		var dy = y - (player.y - 50); // Account for gun offset
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			bullet.directionX = dx / distance;
			bullet.directionY = dy / distance;
		}
		bullets.push(bullet);
	}
};
// Generate note type based on probabilities
function generateNoteType() {
	var random = Math.random();
	if (random < 0.05) {
		return 'bonus'; // 5% chance for bonus notes
	} else if (random < 0.1) {
		return 'challenge'; // 5% chance for challenge notes
	} else if (random < 0.2) {
		return 'fast'; // 10% chance for fast notes
	} else if (random < 0.3) {
		return 'slow'; // 10% chance for slow notes
	} else if (random < 0.33) {
		return 'multiShot'; // 3% chance for multi-shot power-up
	} else if (random < 0.36) {
		return 'slowMotion'; // 3% chance for slow motion power-up
	} else if (random < 0.39) {
		return 'scoreMultiplier'; // 3% chance for score multiplier power-up
	} else if (random < 0.42) {
		return 'movingTarget'; // 3% chance for moving target power-up
	} else if (random < 0.445) {
		return 'laserBeam'; // 2.5% chance for laser beam power-up
	} else if (random < 0.47) {
		return 'shield'; // 2.5% chance for shield power-up
	} else if (random < 0.49) {
		return 'noteDestroyer'; // 2% chance for note destroyer power-up
	} else {
		return 'normal'; // 51% chance for normal notes
	}
}
// Update note preview display
function updateNotePreview(lane, noteType) {
	if (lane >= 0 && lane < previewNotes.length) {
		var preview = previewNotes[lane];
		nextNoteTypes[lane] = noteType;
		// Set preview note appearance based on type
		preview.removeChildren();
		var assetId = 'note';
		var tintColor = 0xFFFFFF;
		switch (noteType) {
			case 'fast':
				assetId = 'noteRed';
				break;
			case 'slow':
				assetId = 'noteBlue';
				break;
			case 'bonus':
				assetId = 'noteGold';
				break;
			case 'challenge':
				assetId = 'notePurple';
				break;
			case 'multiShot':
			case 'slowMotion':
			case 'scoreMultiplier':
				assetId = 'powerUpGreen';
				break;
			case 'movingTarget':
				assetId = 'powerUpRed';
				break;
			case 'laserBeam':
			case 'shield':
			case 'noteDestroyer':
				assetId = 'powerUpBlue';
				break;
		}
		var previewGraphics = LK.getAsset(assetId, {
			anchorX: 0.5,
			anchorY: 0.5,
			scaleX: 1.0,
			scaleY: 1.0,
			alpha: 0.8
		});
		preview.addChild(previewGraphics);
		preview.visible = true;
		// Animate preview appearance
		tween(preview, {
			alpha: 1.0,
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 200,
			easing: tween.easeOut
		});
		// Hide preview after delay
		tween(preview, {
			alpha: 0.6,
			scaleX: 1.0,
			scaleY: 1.0
		}, {
			duration: 300,
			easing: tween.easeIn
		});
	}
}
// Spawn notes
function spawnNote() {
	var lane = Math.floor(Math.random() * 4);
	var note = game.addChild(new Note());
	var targetBoxPositions = [512, 853, 1194, 1536]; // Match target box positions
	note.x = targetBoxPositions[lane];
	note.y = staffY + lane * staffSpacing - 200;
	note.lane = lane;
	// Use generated note type
	var noteType = generateNoteType();
	note.setNoteType(noteType);
	// Show preview for next note
	var nextLane = Math.floor(Math.random() * 4);
	var nextNoteType = generateNoteType();
	updateNotePreview(nextLane, nextNoteType);
	notes.push(note);
}
// Spawn spikes
function spawnSpike() {
	var lane = Math.floor(Math.random() * 4);
	var spike = game.addChild(new Spike());
	var targetBoxPositions = [512, 853, 1194, 1536]; // Match target box positions
	spike.x = targetBoxPositions[lane];
	spike.y = staffY + lane * staffSpacing - 200;
	spike.lane = lane;
	spikes.push(spike);
}
// Check if note is in timing window
function isNoteInTimingWindow(note, targetBox) {
	var noteTop = note.y - 35; // Top of note (note height is 70, so 35 from center)
	var noteBottom = note.y + 35; // Bottom of note
	var targetTop = targetBox.y - 65; // Expanded target area (target height is 130, so 65 from center)
	var targetBottom = targetBox.y + 65; // Expanded target area
	// Check if any part of the note overlaps with the expanded target area
	return noteBottom >= targetTop && noteTop <= targetBottom;
}
// Get timing quality based on note position relative to target center
function getTimingQuality(note, targetBox) {
	var distance = Math.abs(note.y - targetBox.y);
	if (distance <= 20) {
		return 'Perfect!';
	} else if (distance <= 40) {
		return 'Good';
	} else {
		return 'Hit';
	}
}
// Create particle burst effect
function createParticleBurst(x, y, color, count) {
	for (var i = 0; i < count; i++) {
		var particle = LK.getAsset('bullet', {
			anchorX: 0.5,
			anchorY: 0.5,
			scaleX: 0.3,
			scaleY: 0.3,
			tint: color
		});
		particle.x = x;
		particle.y = y;
		game.addChild(particle);
		// Random direction and speed
		var angle = Math.PI * 2 * i / count + (Math.random() - 0.5) * 0.5;
		var speed = 100 + Math.random() * 100;
		var targetX = x + Math.cos(angle) * speed;
		var targetY = y + Math.sin(angle) * speed;
		// Animate particle outward
		tween(particle, {
			x: targetX,
			y: targetY,
			scaleX: 0.1,
			scaleY: 0.1,
			alpha: 0
		}, {
			duration: 800 + Math.random() * 400,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				particle.destroy();
			}
		});
	}
}
// Check and handle level progression
function checkLevelUp() {
	if (currentLevel < maxLevel) {
		var nextLevelThreshold = levelThresholds[currentLevel];
		if (totalScore >= nextLevelThreshold) {
			levelUp();
		}
	}
}
// Handle level up
function levelUp() {
	var previousLevel = currentLevel;
	currentLevel++;
	// Save level progress
	storage.currentLevel = currentLevel;
	storage.totalScore = totalScore;
	storage.levelScore = 0; // Reset level score for new level
	levelScore = 0;
	// Create animated level pop-up display
	var levelPopUpContainer = new Container();
	levelPopUpContainer.x = 1024; // Center of screen
	levelPopUpContainer.y = 1366; // Center of screen
	levelPopUpContainer.alpha = 0;
	levelPopUpContainer.scaleX = 0.1;
	levelPopUpContainer.scaleY = 0.1;
	game.addChild(levelPopUpContainer);
	// Background for pop-up
	var popUpBg = LK.getAsset('targetBox', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 4,
		scaleY: 3,
		tint: 0x000080,
		alpha: 0.9
	});
	levelPopUpContainer.addChild(popUpBg);
	// Level text
	var levelPopUpText = new Text2('LEVEL ' + currentLevel, {
		size: 120,
		fill: 0xFFD700
	});
	levelPopUpText.anchor.set(0.5, 0.5);
	levelPopUpText.y = -30;
	levelPopUpContainer.addChild(levelPopUpText);
	// Level up text
	var levelUpText = new Text2('LEVEL UP!', {
		size: 80,
		fill: 0x00FF00
	});
	levelUpText.anchor.set(0.5, 0.5);
	levelUpText.y = 60;
	levelPopUpContainer.addChild(levelUpText);
	// Animate pop-up appearance
	tween(levelPopUpContainer, {
		alpha: 1,
		scaleX: 1,
		scaleY: 1
	}, {
		duration: 600,
		easing: tween.easeOut
	});
	// Add pulsing effect to level text
	tween(levelPopUpText, {
		scaleX: 1.2,
		scaleY: 1.2
	}, {
		duration: 800,
		easing: tween.easeInOut
	});
	tween(levelPopUpText, {
		scaleX: 1,
		scaleY: 1
	}, {
		duration: 800,
		easing: tween.easeInOut
	});
	// Remove pop-up after delay
	tween(levelPopUpContainer, {
		alpha: 0,
		scaleX: 0.8,
		scaleY: 0.8,
		y: 1200
	}, {
		duration: 800,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			levelPopUpContainer.destroy();
		}
	});
	// Create level up feedback
	createFeedbackText('LEVEL UP!', 1024, 800, 0xFFD700);
	createFeedbackText('Level ' + currentLevel, 1024, 860, 0x0066CC);
	// Flash screen gold for level up
	LK.effects.flashScreen(0xFFD700, 800);
	// Update level display
	updateLevelDisplay();
	// Increase difficulty with level
	increaseDifficultyForLevel();
}
// Update level display
function updateLevelDisplay() {
	if (levelTxt) {
		levelTxt.setText('Level: ' + currentLevel);
	}
	if (currentLevel < maxLevel) {
		var nextThreshold = levelThresholds[currentLevel];
		var progress = totalScore - (currentLevel > 1 ? levelThresholds[currentLevel - 1] : 0);
		var needed = nextThreshold - (currentLevel > 1 ? levelThresholds[currentLevel - 1] : 0);
		if (levelProgressTxt) {
			levelProgressTxt.setText(progress + ' / ' + needed);
		}
	} else {
		if (levelProgressTxt) {
			levelProgressTxt.setText('MAX LEVEL');
		}
	}
}
// Increase difficulty based on current level
function increaseDifficultyForLevel() {
	// Reduce spawn intervals based on level
	noteSpawnInterval = Math.max(30, 90 - (currentLevel - 1) * 3);
	spikeSpawnInterval = Math.max(120, 300 - (currentLevel - 1) * 8);
}
// Create feedback text with animation
function createFeedbackText(text, x, y, color) {
	var feedbackText = new Text2(text, {
		size: 50,
		fill: color
	});
	feedbackText.anchor.set(0.5, 0.5);
	feedbackText.x = x;
	feedbackText.y = y;
	feedbackText.alpha = 1;
	feedbackText.scaleX = 0.5;
	feedbackText.scaleY = 0.5;
	game.addChild(feedbackText);
	feedbackTexts.push(feedbackText);
	// Animate text appearance
	tween(feedbackText, {
		scaleX: 1.2,
		scaleY: 1.2,
		y: y - 50
	}, {
		duration: 300,
		easing: tween.easeOut
	});
	// Fade out and remove
	tween(feedbackText, {
		alpha: 0,
		y: y - 100
	}, {
		duration: 800,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			feedbackText.destroy();
			var index = feedbackTexts.indexOf(feedbackText);
			if (index > -1) {
				feedbackTexts.splice(index, 1);
			}
		}
	});
}
// Show power-up effect display
function showPowerUpDisplay(powerUpType, duration) {
	activePowerUpType = powerUpType;
	activePowerUpMaxDuration = duration;
	// Set power-up name and icon based on type
	var powerUpName = '';
	var iconAsset = 'powerUpGreen';
	var textColor = 0x00FF00;
	switch (powerUpType) {
		case 'multiShot':
			powerUpName = 'Multi-Shot';
			iconAsset = 'powerUpGreen';
			textColor = 0x00FF00;
			break;
		case 'slowMotion':
			powerUpName = 'Slow Motion';
			iconAsset = 'powerUpGreen';
			textColor = 0x00FFFF;
			break;
		case 'scoreMultiplier':
			powerUpName = 'Score x2';
			iconAsset = 'powerUpGreen';
			textColor = 0xFFD700;
			break;
		case 'movingTarget':
			powerUpName = 'Moving Targets';
			iconAsset = 'powerUpRed';
			textColor = 0xFF0000;
			break;
		case 'laserBeam':
			powerUpName = 'Laser Beam';
			iconAsset = 'powerUpBlue';
			textColor = 0x00FFFF;
			break;
		case 'shield':
			powerUpName = 'Shield';
			iconAsset = 'powerUpBlue';
			textColor = 0x00FFFF;
			break;
		case 'noteDestroyer':
			powerUpName = 'Spike Destroyer';
			iconAsset = 'powerUpBlue';
			textColor = 0x00FFFF;
			break;
	}
	// Update display elements
	powerUpDisplayContainer.removeChild(powerUpIconDisplay);
	powerUpIconDisplay = LK.getAsset(iconAsset, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.8,
		scaleY: 0.8
	});
	powerUpIconDisplay.x = 40;
	powerUpIconDisplay.y = 40;
	powerUpDisplayContainer.addChild(powerUpIconDisplay);
	powerUpNameDisplay.setText(powerUpName);
	powerUpNameDisplay.fill = textColor;
	powerUpProgressBar.tint = textColor;
	// Animate display appearance
	tween(powerUpDisplayContainer, {
		alpha: 1,
		scaleX: 1.1,
		scaleY: 1.1
	}, {
		duration: 300,
		easing: tween.easeOut
	});
	tween(powerUpDisplayContainer, {
		scaleX: 1,
		scaleY: 1
	}, {
		duration: 200,
		easing: tween.easeIn
	});
}
// Hide power-up effect display
function hidePowerUpDisplay() {
	activePowerUpType = null;
	activePowerUpMaxDuration = 0;
	tween(powerUpDisplayContainer, {
		alpha: 0,
		scaleX: 0.8,
		scaleY: 0.8
	}, {
		duration: 300,
		easing: tween.easeIn
	});
}
// Game update loop
game.update = function () {
	// Spawn notes
	noteSpawnTimer++;
	if (noteSpawnTimer >= noteSpawnInterval) {
		spawnNote();
		noteSpawnTimer = 0;
	}
	// Spawn spikes
	spikeSpawnTimer++;
	if (spikeSpawnTimer >= spikeSpawnInterval) {
		spawnSpike();
		spikeSpawnTimer = 0;
	}
	// Update and check bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Remove bullets that go off screen
		if (bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Spikes are no longer affected by bullets - they can pass through everything
		// Check collision with target boxes
		for (var j = 0; j < targetBoxes.length; j++) {
			var targetBox = targetBoxes[j];
			if (bullet.intersects(targetBox)) {
				// Check if there's a note in timing window for this lane
				var hitNote = null;
				for (var k = 0; k < notes.length; k++) {
					var note = notes[k];
					if (note.lane === targetBox.lane && !note.hasTriggered && isNoteInTimingWindow(note, targetBox)) {
						hitNote = note;
						break;
					}
				}
				if (hitNote) {
					// Get timing quality for feedback
					var timingQuality = getTimingQuality(hitNote, targetBox);
					var basePoints = hitNote.pointValue;
					var bonusPoints = 0;
					var feedbackColor = 0x00FF00;
					// Handle power-up activation
					if (hitNote.noteType === 'multiShot') {
						multiShotActive = true;
						multiShotTimer = multiShotDuration;
						showPowerUpDisplay('multiShot', multiShotDuration);
						createFeedbackText('Multi-Shot!', targetBox.x, targetBox.y - 120, 0x00FF00);
					} else if (hitNote.noteType === 'slowMotion') {
						slowMotionActive = true;
						slowMotionTimer = slowMotionDuration;
						showPowerUpDisplay('slowMotion', slowMotionDuration);
						createFeedbackText('Slow Motion!', targetBox.x, targetBox.y - 120, 0x00FF00);
					} else if (hitNote.noteType === 'scoreMultiplier') {
						scoreMultiplierActive = true;
						scoreMultiplierTimer = scoreMultiplierDuration;
						showPowerUpDisplay('scoreMultiplier', scoreMultiplierDuration);
						createFeedbackText('Score x2!', targetBox.x, targetBox.y - 120, 0x00FF00);
					} else if (hitNote.noteType === 'movingTarget') {
						movingTargetActive = true;
						movingTargetTimer = movingTargetDuration;
						showPowerUpDisplay('movingTarget', movingTargetDuration);
						createFeedbackText('Moving Targets!', targetBox.x, targetBox.y - 120, 0xFF0000);
					} else if (hitNote.noteType === 'laserBeam') {
						laserBeamActive = true;
						laserBeamTimer = laserBeamDuration;
						showPowerUpDisplay('laserBeam', laserBeamDuration);
						createFeedbackText('Laser Beam!', targetBox.x, targetBox.y - 120, 0x00FFFF);
						// Create laser beam visual effect
						if (laserBeamGraphics) {
							laserBeamGraphics.destroy();
						}
						laserBeamGraphics = LK.getAsset('laserBeam', {
							anchorX: 0.5,
							anchorY: 0,
							x: player.x,
							y: 0,
							height: 2732,
							alpha: 0.8
						});
						game.addChild(laserBeamGraphics);
					} else if (hitNote.noteType === 'shield') {
						if (!shieldActive) {
							shieldActive = true;
							shieldHits = 0;
							showPowerUpDisplay('shield', 999); // Show indefinitely until used
							createFeedbackText('Shield Active!', targetBox.x, targetBox.y - 120, 0x00FFFF);
							// Create shield visual effect
							if (shieldGraphics) {
								shieldGraphics.destroy();
							}
							shieldGraphics = LK.getAsset('shieldEffect', {
								anchorX: 0.5,
								anchorY: 0.5,
								alpha: 0.3
							});
							shieldGraphics.x = 0;
							shieldGraphics.y = 0;
							player.addChild(shieldGraphics);
							// Animate shield appearance
							tween(shieldGraphics, {
								alpha: 0.6,
								scaleX: 1.2,
								scaleY: 1.2
							}, {
								duration: 500,
								easing: tween.easeOut
							});
						}
					} else if (hitNote.noteType === 'noteDestroyer') {
						noteDestroyerActive = true;
						noteDestroyerTimer = noteDestroyerDuration;
						showPowerUpDisplay('noteDestroyer', noteDestroyerDuration);
						createFeedbackText('Spike Destroyer!', targetBox.x, targetBox.y - 120, 0x00FFFF);
						// Immediately destroy all spikes on screen
						for (var s = spikes.length - 1; s >= 0; s--) {
							var spike = spikes[s];
							createParticleBurst(spike.x, spike.y, 0xFF4444, 8);
							spike.destroy();
							spikes.splice(s, 1);
						}
						// Add bonus points for destroyed spikes
						var destroyedCount = spikes.length;
						if (destroyedCount > 0) {
							score += destroyedCount * 50;
							createFeedbackText('+' + destroyedCount * 50 + ' Spike Bonus!', player.x, player.y - 150, 0x00FFFF);
						}
					}
					// Apply combo multiplier and timing bonus
					combo++;
					if (combo > maxCombo) {
						maxCombo = combo;
					}
					// Timing bonuses
					if (timingQuality === 'Perfect!') {
						bonusPoints = Math.floor(basePoints * 0.5);
						feedbackColor = 0xFFD700; // Gold
					} else if (timingQuality === 'Good') {
						bonusPoints = Math.floor(basePoints * 0.2);
						feedbackColor = 0x00FF00; // Green
					} else {
						feedbackColor = 0x88FF88; // Light green
					}
					// Combo multiplier (every 5 combo adds 10% bonus)
					var comboMultiplier = 1 + Math.floor(combo / 5) * 0.1;
					// Score multiplier power-up
					if (scoreMultiplierActive) {
						comboMultiplier *= 2;
					}
					var totalPoints = Math.floor((basePoints + bonusPoints) * comboMultiplier);
					score += totalPoints;
					levelScore += totalPoints;
					totalScore += totalPoints;
					// Check for level up
					checkLevelUp();
					// Save progress
					storage.levelScore = levelScore;
					storage.totalScore = totalScore;
					hitNote.hasTriggered = true;
					// Create feedback text
					createFeedbackText(timingQuality, targetBox.x, targetBox.y - 80, feedbackColor);
					// Create particle burst effect
					var particleColor = feedbackColor;
					var particleCount = 8;
					if (hitNote.noteType === 'bonus') {
						particleColor = 0xFFD700;
						particleCount = 12; // More particles for bonus notes
					} else if (hitNote.noteType === 'challenge') {
						particleColor = 0x8844FF;
					} else if (hitNote.noteType === 'fast') {
						particleColor = 0xFF4444;
					} else if (hitNote.noteType === 'slow') {
						particleColor = 0x4444FF;
					}
					createParticleBurst(hitNote.x, hitNote.y, particleColor, particleCount);
					// Show combo if >= 5
					if (combo >= 5) {
						comboTxt.setText('Combo x' + combo);
						// Scale combo text briefly for emphasis
						tween(comboTxt, {
							scaleX: 1.3,
							scaleY: 1.3
						}, {
							duration: 150,
							easing: tween.easeOut
						});
						tween(comboTxt, {
							scaleX: 1,
							scaleY: 1
						}, {
							duration: 150,
							easing: tween.easeIn
						});
					}
					// Flash different colors based on note type
					var flashColor = 0x00FF00; // Default green
					if (hitNote.noteType === 'bonus') flashColor = 0xFFD700; // Gold
					else if (hitNote.noteType === 'challenge') flashColor = 0x8844FF; // Purple
					else if (hitNote.noteType === 'fast') flashColor = 0xFF4444; // Red
					else if (hitNote.noteType === 'slow') flashColor = 0x4444FF; // Blue
					LK.effects.flashObject(targetBox, flashColor, 500);
					LK.getSound('hit').play();
					// Start or resume music on successful hit
					if (!musicPlaying && musicGlitchTimer === 0) {
						try {
							LK.playMusic(currentMusicTrack);
							musicPlaying = true;
						} catch (e) {
							console.log('Error playing music:', currentMusicTrack);
							musicPlaying = false;
						}
					} else if (musicGlitchTimer > 0) {
						// Resume music after glitch
						try {
							LK.playMusic(currentMusicTrack);
							musicGlitchTimer = 0;
						} catch (e) {
							console.log('Error resuming music:', currentMusicTrack);
						}
					}
					// Remove the note
					hitNote.destroy();
					var noteIndex = notes.indexOf(hitNote);
					if (noteIndex > -1) {
						notes.splice(noteIndex, 1);
					}
				}
				// Remove bullet
				bullet.destroy();
				bullets.splice(i, 1);
				// Update score display
				scoreTxt.setText('Score: ' + score);
				LK.setScore(totalScore); // Use total score for leaderboards
				// Update level display
				updateLevelDisplay();
				break;
			}
		}
	}
	// Update power-up timers
	if (multiShotTimer > 0) {
		multiShotTimer--;
		if (multiShotTimer === 0) {
			multiShotActive = false;
			if (activePowerUpType === 'multiShot') {
				hidePowerUpDisplay();
			}
		}
	}
	if (slowMotionTimer > 0) {
		slowMotionTimer--;
		if (slowMotionTimer === 0) {
			slowMotionActive = false;
			if (activePowerUpType === 'slowMotion') {
				hidePowerUpDisplay();
			}
		}
	}
	if (scoreMultiplierTimer > 0) {
		scoreMultiplierTimer--;
		if (scoreMultiplierTimer === 0) {
			scoreMultiplierActive = false;
			if (activePowerUpType === 'scoreMultiplier') {
				hidePowerUpDisplay();
			}
		}
	}
	if (movingTargetTimer > 0) {
		movingTargetTimer--;
		if (movingTargetTimer === 0) {
			movingTargetActive = false;
			if (activePowerUpType === 'movingTarget') {
				hidePowerUpDisplay();
			}
			// Reset target boxes to original positions
			for (var j = 0; j < targetBoxes.length; j++) {
				targetBoxes[j].x = targetBoxPositions[j];
			}
		}
	}
	// Update new power-up timers
	if (laserBeamTimer > 0) {
		laserBeamTimer--;
		if (laserBeamTimer === 0) {
			laserBeamActive = false;
			if (laserBeamGraphics) {
				laserBeamGraphics.destroy();
				laserBeamGraphics = null;
			}
			if (activePowerUpType === 'laserBeam') {
				hidePowerUpDisplay();
			}
		}
	}
	if (noteDestroyerTimer > 0) {
		noteDestroyerTimer--;
		if (noteDestroyerTimer === 0) {
			noteDestroyerActive = false;
			if (activePowerUpType === 'noteDestroyer') {
				hidePowerUpDisplay();
			}
		}
	}
	// Handle laser beam collision with notes
	if (laserBeamActive && laserBeamGraphics) {
		// Update laser position to follow player horizontally but stay at top
		laserBeamGraphics.x = player.x;
		laserBeamGraphics.y = 0;
		// Check laser collision with all notes
		for (var l = notes.length - 1; l >= 0; l--) {
			var note = notes[l];
			if (Math.abs(note.x - laserBeamGraphics.x) < 50 && note.y < player.y) {
				// Laser hit this note
				var laserPoints = note.pointValue;
				if (scoreMultiplierActive) {
					laserPoints *= 2;
				}
				score += laserPoints;
				createFeedbackText('+' + laserPoints, note.x, note.y - 50, 0x00FFFF);
				createParticleBurst(note.x, note.y, 0x00FFFF, 6);
				note.destroy();
				notes.splice(l, 1);
			}
		}
	}
	// Update power-up display timer and progress bar
	if (activePowerUpType && activePowerUpMaxDuration > 0) {
		var currentTimer = 0;
		if (activePowerUpType === 'multiShot') currentTimer = multiShotTimer;else if (activePowerUpType === 'slowMotion') currentTimer = slowMotionTimer;else if (activePowerUpType === 'scoreMultiplier') currentTimer = scoreMultiplierTimer;else if (activePowerUpType === 'movingTarget') currentTimer = movingTargetTimer;else if (activePowerUpType === 'laserBeam') currentTimer = laserBeamTimer;else if (activePowerUpType === 'shield') {
			// Shield shows number of hits remaining instead of timer
			powerUpTimerDisplay.setText('Hits: ' + (maxShieldHits - shieldHits));
			powerUpProgressBar.width = 200 * ((maxShieldHits - shieldHits) / maxShieldHits);
		} else if (activePowerUpType === 'noteDestroyer') currentTimer = noteDestroyerTimer;
		// Update timer text (convert frames to seconds) for timed power-ups
		if (activePowerUpType !== 'shield') {
			var secondsLeft = Math.ceil(currentTimer / 60);
			powerUpTimerDisplay.setText(secondsLeft + 's');
			// Update progress bar
			var progress = currentTimer / activePowerUpMaxDuration;
			powerUpProgressBar.width = 200 * progress;
		}
	}
	// Move target boxes if moving target power-up is active
	if (movingTargetActive) {
		for (var j = 0; j < targetBoxes.length; j++) {
			var targetBox = targetBoxes[j];
			var originalX = targetBoxPositions[j];
			var offset = Math.sin(LK.ticks * 0.05 + j * 0.5) * 100;
			targetBox.x = originalX + offset;
		}
	}
	// Update and check notes
	for (var i = notes.length - 1; i >= 0; i--) {
		var note = notes[i];
		// Apply slow motion effect
		if (slowMotionActive) {
			note.speed *= 0.5;
		}
		// Check if note has passed through deletion area
		if (note.y > deletionAreaY && !note.hasTriggered) {
			// Only trigger game over for regular music notes, not power-ups
			if (note.noteType !== 'multiShot' && note.noteType !== 'slowMotion' && note.noteType !== 'scoreMultiplier' && note.noteType !== 'movingTarget' && note.noteType !== 'laserBeam' && note.noteType !== 'shield' && note.noteType !== 'noteDestroyer') {
				// Note crashed into secret wall - game over
				LK.showGameOver();
				return; // Exit update loop since game is over
			} else {
				// Power-up notes just get removed without penalty
				note.destroy();
				notes.splice(i, 1);
				continue;
			}
		}
		// Remove notes that go off screen
		if (note.y > 2800) {
			note.destroy();
			notes.splice(i, 1);
		}
		// Restore note speed after slow motion effect
		if (slowMotionActive) {
			note.speed *= 2; // Restore original speed for next frame
		}
	}
	// Update and check spikes
	for (var i = spikes.length - 1; i >= 0; i--) {
		var spike = spikes[i];
		// Apply slow motion effect
		if (slowMotionActive) {
			spike.speed *= 0.5;
		}
		// Check collision with player - game over if spike hits player (unless shield is active)
		if (spike.intersects(player)) {
			if (shieldActive && shieldHits < maxShieldHits) {
				// Shield absorbs the hit
				shieldHits++;
				createFeedbackText('Shield Hit!', player.x, player.y - 100, 0x00FFFF);
				createParticleBurst(spike.x, spike.y, 0x00FFFF, 10);
				LK.effects.flashObject(player, 0x00FFFF, 500);
				// Remove the spike
				spike.destroy();
				spikes.splice(i, 1);
				// Deactivate shield if max hits reached
				if (shieldHits >= maxShieldHits) {
					shieldActive = false;
					if (shieldGraphics) {
						tween(shieldGraphics, {
							alpha: 0,
							scaleX: 0.5,
							scaleY: 0.5
						}, {
							duration: 300,
							easing: tween.easeIn,
							onFinish: function onFinish() {
								shieldGraphics.destroy();
								shieldGraphics = null;
							}
						});
					}
					if (activePowerUpType === 'shield') {
						hidePowerUpDisplay();
					}
					createFeedbackText('Shield Depleted!', player.x, player.y - 120, 0xFF0000);
				}
				continue;
			} else {
				// No shield or shield depleted - game over
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return; // Exit update loop since game is over
			}
		}
		// Spikes can pass through the secret line - no collision check needed
		// Remove spikes that go off screen
		if (spike.y > 2800) {
			spike.destroy();
			spikes.splice(i, 1);
		}
		// Restore spike speed after slow motion effect
		if (slowMotionActive) {
			spike.speed *= 2; // Restore original speed for next frame
		}
	}
	// Handle music glitch timer
	if (musicGlitchTimer > 0) {
		musicGlitchTimer--;
		if (musicGlitchTimer === 0 && musicPlaying) {
			// Resume music after glitch period
			try {
				LK.playMusic(currentMusicTrack);
			} catch (e) {
				console.log('Error resuming music after glitch:', currentMusicTrack);
			}
		}
	}
	// Increase difficulty over time
	if (LK.ticks % 1800 === 0) {
		// Every 30 seconds
		noteSpawnInterval = Math.max(30, noteSpawnInterval - 5);
		// Increase note speed slightly
		for (var i = 0; i < notes.length; i++) {
			notes[i].speed = Math.min(6, notes[i].speed + 0.1);
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -12,9 +12,9 @@
 	var bulletGraphics = self.attachAsset('bullet', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.speed = 31;
+	self.speed = 36;
 	self.targetX = 0;
 	self.targetY = 0;
 	self.directionX = 0;
 	self.directionY = 0;