/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	highScore: 0
});

/**** 
* Classes
****/ 
var Note = Container.expand(function () {
	var self = Container.call(this);
	self.type = 'normal'; // normal, perfect, good
	self.lane = 0; // 0-3 for different lanes
	self.speed = 10; // Base speed
	self.active = true; // Whether note is still active
	self.scored = false; // Whether note has been scored
	self.noteGraphics = null;
	self.perspective = 0; // 0 = distance, 1 = close to screen
	self.baseWidth = 180; // The base width for perspective scaling
	self.baseHeight = 30; // The base height for perspective scaling
	self.distanceZ = 0; // Z-coordinate for 3D perspective (0 = far, 1 = close)
	self.init = function (noteType, laneNum, noteSpeed) {
		self.type = noteType || 'normal';
		self.lane = laneNum || 0;
		self.speed = noteSpeed || 10;
		self.distanceZ = 0; // Start far away
		self.targetX = null; // Target x position for the lane
		self.xSpeed = null; // How fast to move horizontally per frame
		// Create note graphic based on type
		var assetId = 'note';
		if (self.type === 'perfect') {
			assetId = 'perfectNote';
		} else if (self.type === 'good') {
			assetId = 'goodNote';
		}
		self.noteGraphics = self.attachAsset(assetId, {
			anchorX: 0.5,
			anchorY: 0.5,
			alpha: 0.9
		});
		// Apply initial perspective (start small)
		self.updatePerspective(0);
		return self;
	};
	// Update visual perspective based on distance value (0=far, 1=close)
	self.updatePerspective = function (distanceValue) {
		self.distanceZ = distanceValue;
		// Calculate scale based on distance (smaller when far, normal size when close)
		var scale = 0.3 + distanceValue * 0.7; // Scale from 30% to 100%
		// Apply scale to note
		self.noteGraphics.scale.x = scale;
		self.noteGraphics.scale.y = scale;
		// Adjust alpha to fade in as it gets closer
		self.noteGraphics.alpha = 0.5 + distanceValue * 0.5;
	};
	self.update = function () {
		if (!self.active) {
			return;
		}
		// Move note down
		self.y += self.speed;
		// Store last speed for smooth changes
		self.lastSpeed = self.speed;
		// Move note horizontally towards target lane if xSpeed is defined
		if (self.xSpeed) {
			// Calculate remaining distance to target
			var remainingX = self.targetX - self.x;
			// Move towards target, but don't overshoot
			if (Math.abs(remainingX) < Math.abs(self.xSpeed)) {
				self.x = self.targetX; // Arrived at exact position
			} else {
				self.x += self.xSpeed; // Move towards target
			}
		}
		// Calculate perspective based on y position
		// Map y position from starting position to target (2500) to 0-1 perspective value
		var startPos = 2732 / 2 + noteStartY;
		var targetPos = 2500;
		var totalDistance = targetPos - startPos;
		var perspectiveValue = Math.max(0, Math.min(1, (self.y - startPos) / totalDistance));
		self.updatePerspective(perspectiveValue);
		// Check if note passed through target zone and wasn't scored
		var hitY = targetZones[self.lane].y;
		var targetBottom = hitY + targetBoxSize.height / 2;
		// Track when note passes completely through the target zone 
		if (self.y > targetBottom + 50 && !self.scored) {
			// Note passed through target zone without being hit
			self.miss();
		}
		// Check if note is completely out of bounds and hasn't been scored
		else if (self.y > 2732 + 100 && !self.scored) {
			self.miss();
		}
	};
	self.hit = function (accuracy) {
		if (!self.active || self.scored) {
			return;
		}
		self.scored = true;
		self.active = false;
		// Create hit effect
		LK.effects.flashObject(self, 0xFFFFFF, 300);
		if (accuracy === 'perfect') {
			LK.getSound('perfectSound').play();
			tween(self.noteGraphics, {
				alpha: 0,
				scaleX: 1.5,
				scaleY: 1.5
			}, {
				duration: 300,
				onFinish: function onFinish() {
					self.destroy();
				}
			});
		} else if (accuracy === 'good') {
			LK.getSound('hitSound').play();
			tween(self.noteGraphics, {
				alpha: 0,
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 300,
				onFinish: function onFinish() {
					self.destroy();
				}
			});
		} else {
			LK.getSound('hitSound').play();
			tween(self.noteGraphics, {
				alpha: 0
			}, {
				duration: 200,
				onFinish: function onFinish() {
					self.destroy();
				}
			});
		}
	};
	self.miss = function () {
		if (!self.active || self.scored) {
			return;
		}
		self.scored = true;
		self.active = false;
		// Increment missedNotes counter only if the note passed through target zone
		var hitY = targetZones[self.lane].y;
		var targetTop = hitY - targetBoxSize.height / 2;
		var targetBottom = hitY + targetBoxSize.height / 2;
		var wasInTargetZone = self.y >= targetTop && self.y <= targetBottom;
		if (wasInTargetZone || self.y > targetBottom) {
			// Only count as missed if it was in or passed the target zone
			missedNotes++;
		}
		// Update accuracy display when a note is missed
		scoreDisplay.updateAccuracy(calculateAccuracy());
		scoreDisplay.showFeedback('miss');
		LK.getSound('missSound').play();
		// Change to missed note appearance
		if (self.noteGraphics) {
			self.removeChild(self.noteGraphics);
		}
		self.noteGraphics = self.attachAsset('missedNote', {
			anchorX: 0.5,
			anchorY: 0.5,
			alpha: 0.5
		});
		tween(self.noteGraphics, {
			alpha: 0
		}, {
			duration: 200,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
var ScoreDisplay = Container.expand(function () {
	var self = Container.call(this);
	self.scoreText = null;
	self.comboText = null;
	self.accuracyText = null;
	self.feedbackText = null;
	self.init = function () {
		// Create score text
		self.scoreText = new Text2('Score: 0', {
			size: 80,
			fill: 0xFFFFFF
		});
		self.scoreText.anchor.set(0.5, 0);
		self.addChild(self.scoreText);
		// Create high score text
		self.highScoreText = new Text2('High Score: ' + highScore, {
			size: 40,
			fill: 0xFFAA00
		});
		self.highScoreText.anchor.set(0.5, 0);
		self.highScoreText.y = 100;
		self.addChild(self.highScoreText);
		// Create accuracy text
		self.accuracyText = new Text2('Accuracy: 0%', {
			size: 40,
			fill: 0xDDDDDD
		});
		self.accuracyText.anchor.set(0.5, 0);
		self.accuracyText.y = 160;
		self.addChild(self.accuracyText);
		// Create feedback text for "Perfect!", "Good!", "Miss!"
		self.feedbackText = new Text2('', {
			size: 90,
			fill: 0xFFFFFF
		});
		self.feedbackText.anchor.set(0.5, 0.5);
		self.feedbackText.y = 300;
		self.addChild(self.feedbackText);
		return self;
	};
	self.updateScore = function (score) {
		self.scoreText.setText('Score: ' + score);
	};
	// Combo update method removed
	self.updateAccuracy = function (accuracy) {
		// Color code the accuracy based on performance
		var color = "#DDDDDD"; // Default color
		if (accuracy >= 90) {
			color = "#00FF00"; // Excellent (green)
		} else if (accuracy >= 75) {
			color = "#FFFF00"; // Good (yellow)
		} else if (accuracy >= 50) {
			color = "#FFA500"; // Fair (orange)
		} else {
			color = "#FF0000"; // Poor (red)
		}
		self.accuracyText.setText('Accuracy: ' + accuracy + '%', {
			fill: color
		});
	};
	self.updateHighScore = function (newHighScore) {
		self.highScoreText.setText('High Score: ' + newHighScore);
	};
	self.showFeedback = function (type) {
		// Clear any existing animations
		tween.stop(self.feedbackText, {
			alpha: true,
			scaleX: true,
			scaleY: true
		});
		var color = "#FFFFFF";
		var text = "";
		if (type === 'perfect') {
			text = "Perfect!";
			color = "#FF4500";
		} else if (type === 'good') {
			text = "Good!";
			color = "#32CD32";
		} else if (type === 'miss') {
			text = "Miss!";
			color = "#888888";
		}
		self.feedbackText.setText(text);
		// Set the text with the new color in the style
		self.feedbackText.setText(text, {
			fill: color
		});
		self.feedbackText.alpha = 1;
		self.feedbackText.scale.set(1.3, 1.3);
		tween(self.feedbackText, {
			alpha: 0,
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 600,
			easing: tween.easeOut
		});
	};
	return self;
});
var TargetZone = Container.expand(function () {
	var self = Container.call(this);
	self.lane = 0;
	self.zoneGraphics = null;
	self.active = false;
	self.pulseTimer = 0;
	self.perspectiveLines = null;
	self.init = function (laneNum) {
		self.lane = laneNum || 0;
		// Create target zone with 3D perspective appearance
		self.zoneGraphics = self.attachAsset('targetZone', {
			anchorX: 0.5,
			anchorY: 0.5,
			alpha: 0.4,
			width: targetBoxSize.width,
			// Use the target box size variable here
			height: targetBoxSize.height
		});
		// Create perspective guide elements to enhance 3D effect
		self.createPerspectiveGuides();
		return self;
	};
	// Add perspective guides to enhance 3D effect
	self.createPerspectiveGuides = function () {
		self.perspectiveLines = new Container();
		self.addChild(self.perspectiveLines);
		// Create 3D perspective indicator lines in the lane
		for (var i = 1; i <= 3; i++) {
			var depth = i * 0.25; // 0.25, 0.5, 0.75 positions
			var lineSize = targetBoxSize.width * (0.4 + depth * 0.6); // Gets larger as it gets closer
			var opacity = 0.15 + (1 - depth) * 0.1; // Fades as it gets closer
			var line = LK.getAsset('targetZone', {
				anchorX: 0.5,
				anchorY: 0.5,
				width: lineSize,
				height: 5,
				alpha: opacity
			});
			// Position lines above the target zone
			line.y = -(400 * depth);
			self.perspectiveLines.addChild(line);
		}
	};
	self.update = function () {
		// Subtle pulsing effect when not active
		if (!self.active) {
			self.pulseTimer += 0.05;
			self.zoneGraphics.alpha = 0.3 + Math.sin(self.pulseTimer) * 0.1;
		}
	};
	self.activate = function () {
		if (self.active) {
			return;
		}
		self.active = true;
		tween(self.zoneGraphics, {
			alpha: 0.8,
			scaleX: 1.1,
			scaleY: 1.1
		}, {
			duration: 100,
			onFinish: function onFinish() {
				self.deactivate();
			}
		});
	};
	self.deactivate = function () {
		self.active = false;
		tween(self.zoneGraphics, {
			alpha: 0.4,
			scaleX: 1.0,
			scaleY: 1.0
		}, {
			duration: 200
		});
	};
	self.down = function (x, y, obj) {
		self.activate();
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x111133
});

/**** 
* Game Code
****/ 
// Default size, will be overridden when initialized
// Game configuration
var laneCount = 4;
var laneWidth = 2048 / laneCount;
var targetBoxSize = {
	width: 500,
	height: 400
}; // Adjustable target zone dimensions
var noteStartY = -800; // Adjustable starting position for notes, default is 200 above screen center
var minNoteSpeed = 5; // Minimum speed of notes at game start
var maxNoteSpeed = 40; // Maximum speed notes can reach
var speedRampUpTime = 60 * 180; // Time in frames to reach max speed (30 seconds at 60fps)
var gameSpeed = minNoteSpeed; // Starting game speed uses minNoteSpeed
var currentLevel = 1;
var difficultyMultiplier = 1.0;
var speedIncreaseInterval = 300; // Frames between speed increases (5 seconds at 60fps)
var speedIncreaseAmount = 0.5; // How much to increase speed each interval
var speedIncreaseMax = maxNoteSpeed / minNoteSpeed; // Maximum speed multiplier derived from min/max speed
var lastSpeedIncreaseTime = 0; // Track last time speed was increased
var beatFrequency = 60; // Frames between beat patterns
var beatVariance = 10; // Random variation in beat timing
var nextBeatFrame = 20; // When to spawn the next beat
var perspectiveEnabled = true; // Enable the perspective effect
var perspectiveHeight = 2000; // Visual height of the 3D perspective lane
// Note density configuration
var minNotesPerLanePerSecond = 0.5; // Minimum notes per lane per second (at 60fps)
var maxNotesPerLanePerSecond = 2.5; // Maximum notes per lane per second (at 60fps)
var noteDensityRampUpTime = 60 * 120; // Time in frames to reach max density (120 seconds at 60fps)
var currentNoteDensity = minNotesPerLanePerSecond; // Current note density, starts at minimum
// Game state
var score = 0;
var combo = 0;
var maxCombo = 0;
var totalNotes = 0;
var hitNotes = 0;
var missedNotes = 0; // Track notes that passed through target zone and were missed
var perfectHits = 0;
var activeNotes = [];
var targetZones = [];
var gameStarted = false;
var gameOver = false;
var highScore = storage.highScore || 0;
// UI elements
var scoreDisplay;
var startText;
var backgroundShape;
// Add background layers
// First add the back background layer
var backgroundBackShape = game.addChild(LK.getAsset('backgroundBack', {
	anchorX: 0,
	anchorY: 0,
	width: 2048,
	height: 2732
}));
// Background image removed
// Make sure backgroundBackShape is at the bottom of the display stack
game.setChildIndex(backgroundBackShape, 0);
// Create perspective lanes and target zones
function createPerspectiveLane(laneNum) {
	var container = new Container();
	var laneX = laneWidth * (laneNum + 0.5);
	// Add the lane image
	var laneImage = LK.getAsset('noteLane', {
		anchorX: 0.5,
		anchorY: 0,
		alpha: 0.6,
		width: targetBoxSize.width * 0.9 // Make it slightly narrower than target box
	});
	// Position the lane image
	laneImage.y = 500; // Start position
	laneImage.height = perspectiveHeight; // Set lane height
	// Add some subtle perspective effect with gradual fade
	var gradient = [];
	for (var i = 1; i <= 5; i++) {
		var distance = i / 5; // 0.2 to 1.0
		var y = 500 + distance * 1800; // Map to y positions
		var lineOpacity = 0.05 + (1 - distance) * 0.1; // Fade with distance
		// Create lane markers as subtle horizontal lines
		var marker = LK.getAsset('targetZone', {
			anchorX: 0.5,
			anchorY: 0.5,
			width: targetBoxSize.width * (0.4 + distance * 0.6),
			height: 2,
			alpha: lineOpacity
		});
		marker.y = y;
		gradient.push(marker);
		container.addChild(marker);
	}
	// Add lane image last so it appears on top of markers
	container.addChild(laneImage);
	container.x = laneX;
	return container;
}
// Create perspective lanes - use a single lane image background instead of multiple lanes
if (perspectiveEnabled) {
	// Add a single noteLane image spanning the entire width of the game
	var fullLaneImage = LK.getAsset('noteLane', {
		anchorX: 0.5,
		anchorY: 0,
		alpha: 0.6,
		width: 2048,
		// Full game width
		height: perspectiveHeight
	});
	// Position the lane image
	fullLaneImage.x = 2048 / 2; // Center horizontally
	fullLaneImage.y = 500; // Start position
	game.addChild(fullLaneImage);
	// Add subtle lane markers to help with visual guidance
	for (var i = 1; i <= laneCount - 1; i++) {
		// Create divider lines between lanes
		var divider = LK.getAsset('targetZone', {
			anchorX: 0.5,
			anchorY: 0,
			width: 2,
			height: perspectiveHeight,
			alpha: 0.3
		});
		divider.x = laneWidth * i; // Position at lane dividers
		divider.y = 500;
		game.addChild(divider);
	}
}
// Create target zones
for (var i = 0; i < laneCount; i++) {
	var zone = new TargetZone().init(i);
	zone.x = laneWidth * (i + 0.5);
	zone.y = 2500; // Bottom of screen
	targetZones.push(zone);
	game.addChild(zone);
}
// Create and position score display
scoreDisplay = new ScoreDisplay().init();
scoreDisplay.x = 2048 / 2;
scoreDisplay.y = 150;
game.addChild(scoreDisplay);
// Create start text
startText = new Text2('Tap to Start', {
	size: 120,
	fill: 0xFFFFFF
});
startText.anchor.set(0.5, 0.5);
startText.x = 2048 / 2;
startText.y = 2732 / 2;
game.addChild(startText);
// Calculate accuracy as a percentage
function calculateAccuracy() {
	// Base case: if no notes have reached the target zone yet
	if (hitNotes + missedNotes === 0) {
		return 100;
	}
	// Calculate the actual percentage of notes hit versus total notes that passed through the target zone
	return Math.floor(hitNotes / (hitNotes + missedNotes) * 100);
}
// Spawn a new note
function spawnNote() {
	var laneNum = Math.floor(Math.random() * laneCount);
	var noteType = 'normal';
	// 20% chance for a "perfect" note, 30% chance for a "good" note
	var rand = Math.random();
	if (rand < 0.2) {
		noteType = 'perfect';
	} else if (rand < 0.5) {
		noteType = 'good';
	}
	// Use the current game speed (which changes over time) multiplied by difficulty
	var noteSpeed = gameSpeed * difficultyMultiplier;
	var note = new Note().init(noteType, laneNum, noteSpeed);
	note.x = 2048 / 2; // Start at the center of the screen on x axis
	note.y = 2732 / 2 + noteStartY; // Start above center of the screen based on noteStartY variable
	note.targetX = laneWidth * (laneNum + 0.5); // Store target x position
	// Calculate distance to travel in x axis
	var xDistance = note.targetX - note.x;
	// Calculate time to reach target zone based on y distance and speed
	var timeToTarget = (2500 - (2732 / 2 + noteStartY)) / noteSpeed;
	// Calculate how much to move per frame to reach target at the same time as reaching target zone
	note.xSpeed = xDistance / timeToTarget;
	// No immediate tween - will move gradually in update function
	// Apply perspective effect
	if (perspectiveEnabled) {
		// Start with small scale to create distance effect
		note.updatePerspective(0); // 0 = far away
		// Apply entrance animation for perspective effect
		note.noteGraphics.alpha = 0.4; // Start more transparent
		// Apply a grow animation to the note as it appears
		tween(note.noteGraphics, {
			alpha: 0.9
		}, {
			duration: 300,
			easing: tween.easeOut
		});
	}
	activeNotes.push(note);
	game.addChild(note);
	totalNotes++;
	return note;
}
// Generate beat pattern
function generateBeatPattern() {
	// Calculate number of notes based on current density
	var notesPerPattern = Math.max(1, Math.floor(currentNoteDensity * laneCount));
	// Calculate if we should add extra notes for some lanes
	var extraNotes = Math.random() < currentNoteDensity * laneCount - notesPerPattern ? 1 : 0;
	var totalNotesThisPattern = notesPerPattern + extraNotes;
	// Create an array to track which lanes already have notes in this pattern
	var lanesUsed = [];
	// Calculate a staggered timing for the notes
	var baseDelay = 60 / currentNoteDensity; // Time between notes in frames
	for (var i = 0; i < totalNotesThisPattern; i++) {
		// Choose a lane that hasn't been used yet if possible
		var lane;
		if (lanesUsed.length < laneCount) {
			do {
				lane = Math.floor(Math.random() * laneCount);
			} while (lanesUsed.includes(lane));
			lanesUsed.push(lane);
		} else {
			// If all lanes used, just pick a random lane
			lane = Math.floor(Math.random() * laneCount);
		}
		// Stagger notes timing based on density and difficulty
		var delay = Math.floor(i * (baseDelay / difficultyMultiplier));
		// Add some slight randomness to the timing
		delay += Math.floor(Math.random() * 10 - 5);
		// Spawn the note with the calculated delay
		LK.setTimeout(function (laneNum) {
			if (!gameOver && gameStarted) {
				var note = spawnNote();
				note.lane = laneNum; // Override lane since we selected it specifically
				note.targetX = laneWidth * (laneNum + 0.5); // Update target position
				// Recalculate xSpeed based on new target
				var xDistance = note.targetX - note.x;
				var timeToTarget = (2500 - (2732 / 2 + noteStartY)) / note.speed;
				note.xSpeed = xDistance / timeToTarget;
			}
		}, delay, lane);
	}
}
// Check if a note is in the hit zone
function checkNoteHit(laneNum) {
	var hitZone = targetZones[laneNum];
	var hitY = hitZone.y;
	var hitFound = false;
	// Find notes in this lane
	for (var i = 0; i < activeNotes.length; i++) {
		var note = activeNotes[i];
		if (note.lane === laneNum && note.active && !note.scored) {
			// Check if note is inside target zone bounds
			var targetTop = hitY - targetBoxSize.height / 2;
			var targetBottom = hitY + targetBoxSize.height / 2;
			var isInsideTargetZone = note.y >= targetTop && note.y <= targetBottom;
			if (isInsideTargetZone) {
				// Calculate distance from perfect hit position as a percentage of target box height
				var distance = Math.abs(note.y - hitY);
				var distancePercent = distance / (targetBoxSize.height / 2);
				// Different hit zones based on percentage of target box height
				if (distancePercent < 0.3) {
					// Perfect hit - center 30% of target zone
					score += 100;
					hitNotes++;
					perfectHits++;
					note.hit('perfect');
					scoreDisplay.showFeedback('perfect');
					hitFound = true;
					break;
				} else if (distancePercent < 0.7) {
					// Good hit - middle 40% of target zone
					score += 50;
					hitNotes++;
					note.hit('good');
					scoreDisplay.showFeedback('good');
					hitFound = true;
					break;
				} else {
					// Within bounds but not centered - early/late hit at edges of target zone
					score += 10;
					hitNotes++;
					note.hit('early');
					scoreDisplay.showFeedback('good');
					hitFound = true;
					break;
				}
			}
		}
	}
	// If we didn't hit any notes, it's a miss
	if (!hitFound) {
		scoreDisplay.showFeedback('miss');
	}
	// Update score display
	var roundedScore = Math.floor(score);
	scoreDisplay.updateScore(roundedScore);
	maxCombo = Math.max(maxCombo, combo);
	// Check and update high score
	if (roundedScore > highScore) {
		highScore = roundedScore;
		storage.highScore = highScore;
		scoreDisplay.updateHighScore(highScore);
		// Flash high score when new record is set
		if (roundedScore > 0) {
			scoreDisplay.showFeedback("New High Score!");
			LK.effects.flashObject(scoreDisplay.highScoreText, 0xFFFF00, 500);
		}
	}
	// Update accuracy after every note hit
	var accuracy = calculateAccuracy();
	scoreDisplay.updateAccuracy(accuracy);
	return hitFound;
}
// Handle tap on a lane
function handleLaneTap(laneNum) {
	if (!gameStarted || gameOver) {
		return;
	}
	targetZones[laneNum].activate();
	return checkNoteHit(laneNum);
}
// Start the game
function startGame() {
	if (gameStarted) {
		return;
	}
	gameStarted = true;
	game.removeChild(startText);
	// Reset game state
	score = 0;
	combo = 0;
	maxCombo = 0;
	totalNotes = 0;
	hitNotes = 0;
	missedNotes = 0; // Reset missed notes counter
	perfectHits = 0;
	currentLevel = 1;
	difficultyMultiplier = 1.0;
	gameSpeed = minNoteSpeed; // Reset base speed to minimum
	currentNoteDensity = minNotesPerLanePerSecond; // Reset note density to minimum
	lastSpeedIncreaseTime = 0;
	gameOver = false;
	// Update UI
	scoreDisplay.updateScore(score);
	// Initialize accuracy with default 100% at game start
	scoreDisplay.updateAccuracy(100);
	scoreDisplay.updateHighScore(highScore);
	// Initial speed up message
	scoreDisplay.showFeedback("Get Ready!");
	// Start music
	LK.playMusic('gameMusic', {
		fade: {
			start: 0,
			end: 1,
			duration: 1000
		}
	});
	// Set the first beat to spawn soon
	nextBeatFrame = 60;
}
// Check if game should end (based on time or score)
function checkGameOver() {
	// For demo purposes, end game after reaching level 10
	if (currentLevel >= 10 && score >= 10000) {
		endGame(true); // Win
	}
	// Player loses if accuracy drops too low
	if (totalNotes > 20 && calculateAccuracy() < 40) {
		endGame(false); // Lose
	}
}
// End the game
function endGame(win) {
	gameOver = true;
	// Fade out music
	LK.playMusic('gameMusic', {
		fade: {
			start: 1,
			end: 0,
			duration: 800
		}
	});
	// Save high score to storage
	if (score > highScore) {
		highScore = Math.floor(score);
		storage.highScore = highScore;
	}
	// Show game over or win screen based on performance
	if (win) {
		LK.showYouWin();
	} else {
		LK.showGameOver();
	}
}
// Handle lane tap detection - we'll divide the screen into lanes
function getLaneFromPosition(x) {
	return Math.floor(x / laneWidth);
}
// Handle touch events
game.down = function (x, y, obj) {
	if (!gameStarted) {
		startGame();
	} else {
		var lane = getLaneFromPosition(x);
		if (lane >= 0 && lane < laneCount) {
			handleLaneTap(lane);
		}
	}
};
game.update = function () {
	if (!gameStarted) {
		return;
	}
	// Update all active notes
	for (var i = activeNotes.length - 1; i >= 0; i--) {
		var note = activeNotes[i];
		// Remove notes that have been scored and faded out
		if (!note.active && note.scored) {
			activeNotes.splice(i, 1);
		}
	}
	// Update target zones
	for (var j = 0; j < targetZones.length; j++) {
		targetZones[j].update();
	}
	// Generate new beat patterns at intervals
	if (gameStarted && !gameOver) {
		if (LK.ticks >= nextBeatFrame) {
			generateBeatPattern();
			// Calculate next beat timing with some variance
			var interval = beatFrequency - currentLevel * 5;
			interval = Math.max(interval, 30); // Don't go too fast
			var variance = Math.floor(Math.random() * beatVariance) - beatVariance / 2;
			nextBeatFrame = LK.ticks + interval + variance;
			// Increase difficulty over time
			if (LK.ticks % 600 === 0) {
				// Every 10 seconds
				currentLevel++;
				difficultyMultiplier = 1.0 + currentLevel * 0.2; // Increased from 0.1 to 0.2 for faster speed growth
				// Dynamically increase speed of existing notes
				for (var i = 0; i < activeNotes.length; i++) {
					var note = activeNotes[i];
					if (note.active) {
						// Gradually increase speed over 1 second
						tween(note, {
							speed: gameSpeed * difficultyMultiplier
						}, {
							duration: 1000,
							easing: tween.easeOut
						});
					}
				}
			}
		}
	}
	// Apply continuous speed increase based on game time
	if (gameStarted && !gameOver) {
		// Calculate progress based on time elapsed since start
		var progressToMaxSpeed = Math.min(1.0, LK.ticks / speedRampUpTime);
		// Calculate new game speed based on progress between min and max
		var newGameSpeed = minNoteSpeed + (maxNoteSpeed - minNoteSpeed) * progressToMaxSpeed;
		// Calculate progress for note density increase
		var progressToDensity = Math.min(1.0, LK.ticks / noteDensityRampUpTime);
		// Calculate new note density based on progress between min and max
		var newNoteDensity = minNotesPerLanePerSecond + (maxNotesPerLanePerSecond - minNotesPerLanePerSecond) * progressToDensity;
		// Only update if speed or density changed significantly
		var speedChanged = Math.abs(gameSpeed - newGameSpeed) > 0.1;
		var densityChanged = Math.abs(currentNoteDensity - newNoteDensity) > 0.05;
		if (speedChanged || densityChanged) {
			// Update game speed and density
			gameSpeed = newGameSpeed;
			currentNoteDensity = newNoteDensity;
			// If note density increased significantly, give visual feedback
			if (densityChanged && LK.ticks % 600 === 0) {
				scoreDisplay.showFeedback("More Notes!");
			}
			// Update all active notes with tween for smooth speed transition
			for (var k = 0; k < activeNotes.length; k++) {
				var activeNote = activeNotes[k];
				if (activeNote.active) {
					// Apply new speed with smooth tween transition
					tween(activeNote, {
						speed: gameSpeed * difficultyMultiplier
					}, {
						duration: 500,
						easing: tween.easeInOut
					});
				}
			}
			// Visual feedback when speed increases significantly
			if (speedChanged && LK.ticks % 300 === 0) {
				scoreDisplay.showFeedback("Speed Up!");
				// Flash effect on target zones to indicate increased speed
				for (var i = 0; i < targetZones.length; i++) {
					LK.effects.flashObject(targetZones[i], 0xFF4500, 300);
				}
			}
		}
	}
	// Check for game over conditions
	checkGameOver();
};

===================================================================
--- original.js
+++ change.js
@@ -384,9 +384,9 @@
 var gameSpeed = minNoteSpeed; // Starting game speed uses minNoteSpeed
 var currentLevel = 1;
 var difficultyMultiplier = 1.0;
 var speedIncreaseInterval = 300; // Frames between speed increases (5 seconds at 60fps)
-var speedIncreaseAmount = 0.05; // How much to increase speed each interval
+var speedIncreaseAmount = 0.5; // How much to increase speed each interval
 var speedIncreaseMax = maxNoteSpeed / minNoteSpeed; // Maximum speed multiplier derived from min/max speed
 var lastSpeedIncreaseTime = 0; // Track last time speed was increased
 var beatFrequency = 60; // Frames between beat patterns
 var beatVariance = 10; // Random variation in beat timing