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

/**** 
* 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.init = function (noteType, laneNum, noteSpeed) {
		self.type = noteType || 'normal';
		self.lane = laneNum || 0;
		self.speed = noteSpeed || 10;
		// 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
		});
		return self;
	};
	self.update = function () {
		if (!self.active) {
			return;
		}
		// Move note down
		self.y += self.speed;
		// Store last speed for smooth changes
		self.lastSpeed = self.speed;
		// Check if note is out of bounds and hasn't been scored
		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;
		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 combo text
		self.comboText = new Text2('Combo: 0', {
			size: 60,
			fill: 0xFFFFFF
		});
		self.comboText.anchor.set(0.5, 0);
		self.comboText.y = 90;
		self.addChild(self.comboText);
		// 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);
	};
	self.updateCombo = function (combo) {
		self.comboText.setText('Combo: ' + combo);
		// Scale effect on combo update
		tween.stop(self.comboText, {
			scaleX: true,
			scaleY: true
		});
		self.comboText.scale.set(1.2, 1.2);
		tween(self.comboText, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 300,
			easing: tween.elasticOut
		});
	};
	self.updateAccuracy = function (accuracy) {
		self.accuracyText.setText('Accuracy: ' + accuracy + '%');
	};
	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.init = function (laneNum) {
		self.lane = laneNum || 0;
		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
		});
		return self;
	};
	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
****/ 
// Game configuration
// Default size, will be overridden when initialized
var laneCount = 4;
var laneWidth = 2048 / laneCount;
var targetBoxSize = {
	width: 300,
	height: 300
}; // Adjustable target zone dimensions
var gameSpeed = 6; // Increased base speed multiplier (was 5)
var currentLevel = 1;
var difficultyMultiplier = 1.0;
var speedIncreaseInterval = 300; // Frames between speed increases (5 seconds at 60fps)
var beatFrequency = 60; // Frames between beat patterns
var beatVariance = 10; // Random variation in beat timing
var nextBeatFrame = 20; // When to spawn the next beat
// Background animation configuration
var backgroundColors = [0x111133,
// Dark blue
0x331133,
// Dark purple
0x331111,
// Dark red
0x113311,
// Dark green
0x333311 // Dark yellow
];
var currentColorIndex = 0;
var colorTransitionDuration = 5000; // 5 seconds for each color transition
var nextColorChangeTime = 0;
// Game state
var score = 0;
var combo = 0;
var maxCombo = 0;
var totalNotes = 0;
var hitNotes = 0;
var perfectHits = 0;
var activeNotes = [];
var targetZones = [];
var gameStarted = false;
var gameOver = false;
// UI elements
var scoreDisplay;
var startText;
var backgroundShape;
// Add background
backgroundShape = game.addChild(LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0
}));
// 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() {
	if (totalNotes === 0) {
		return 100;
	}
	return Math.floor(hitNotes / totalNotes * 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';
	}
	var noteSpeed = gameSpeed * difficultyMultiplier;
	var note = new Note().init(noteType, laneNum, noteSpeed);
	note.x = laneWidth * (laneNum + 0.5);
	note.y = -50; // Start above the screen
	activeNotes.push(note);
	game.addChild(note);
	totalNotes++;
	return note;
}
// Generate beat pattern
function generateBeatPattern() {
	var patternLength = Math.min(4, 1 + Math.floor(currentLevel / 2));
	for (var i = 0; i < patternLength; i++) {
		// Stagger notes based on pattern position
		LK.setTimeout(function () {
			if (!gameOver && gameStarted) {
				spawnNote();
			}
		}, i * (200 / difficultyMultiplier));
	}
}
// 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 * (1 + combo / 10);
					combo++;
					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 * (1 + combo / 20);
					combo++;
					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;
					combo++;
					hitNotes++;
					note.hit('early');
					scoreDisplay.showFeedback('good');
					hitFound = true;
					break;
				}
			}
		}
	}
	// If we didn't hit any notes, it's a miss
	if (!hitFound) {
		combo = 0;
		scoreDisplay.showFeedback('miss');
	}
	// Update score display
	scoreDisplay.updateScore(Math.floor(score));
	scoreDisplay.updateCombo(combo);
	maxCombo = Math.max(maxCombo, combo);
	// Update accuracy
	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;
	perfectHits = 0;
	currentLevel = 1;
	difficultyMultiplier = 1.0;
	gameSpeed = 6; // Reset base speed
	gameOver = false;
	// Start background color animation
	nextColorChangeTime = LK.ticks;
	// Update UI
	scoreDisplay.updateScore(score);
	scoreDisplay.updateCombo(combo);
	scoreDisplay.updateAccuracy(100);
	// 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
		}
	});
	// 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 () {
	// Animate background color regardless of game state
	if (LK.ticks >= nextColorChangeTime) {
		// Get next color index
		currentColorIndex = (currentColorIndex + 1) % backgroundColors.length;
		// Set next color transition time
		nextColorChangeTime = LK.ticks + colorTransitionDuration / 1000 * 60; // Convert ms to frames
		// Animate background color transition
		tween(backgroundShape, {
			tint: backgroundColors[currentColorIndex]
		}, {
			duration: colorTransitionDuration,
			easing: tween.easeInOut
		});
		// Also animate game background color
		// Use standard tween with setBackgroundColor instead of nonexistent colorTo method
		tween({
			value: game.backgroundColor,
			onUpdate: function onUpdate(obj) {
				game.setBackgroundColor(obj.value);
			}
		}, {
			value: backgroundColors[currentColorIndex]
		}, {
			duration: colorTransitionDuration,
			easing: tween.easeInOut
		});
	}
	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
	if (gameStarted && !gameOver && LK.ticks % speedIncreaseInterval === 0) {
		// Small incremental speed increase every few seconds
		difficultyMultiplier += 0.05;
		// Visual feedback when speed increases
		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
@@ -560,11 +560,17 @@
 			duration: colorTransitionDuration,
 			easing: tween.easeInOut
 		});
 		// Also animate game background color
-		tween.colorTo(game, {
-			backgroundColor: backgroundColors[currentColorIndex]
+		// Use standard tween with setBackgroundColor instead of nonexistent colorTo method
+		tween({
+			value: game.backgroundColor,
+			onUpdate: function onUpdate(obj) {
+				game.setBackgroundColor(obj.value);
+			}
 		}, {
+			value: backgroundColors[currentColorIndex]
+		}, {
 			duration: colorTransitionDuration,
 			easing: tween.easeInOut
 		});
 	}