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

/**** 
* Classes
****/ 
var Character = Container.expand(function () {
	var self = Container.call(this);
	var characterGraphics = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	// Random rotation
	characterGraphics.rotation = Math.random() * Math.PI * 2;
	// Store whether this character has been discovered
	self.discovered = false;
	self.lastDistance = 9999;
	// Method to reveal character temporarily
	self.reveal = function (intensity) {
		// Intensity from 0 to 1 based on distance from sound wave
		if (intensity > 0) {
			var targetAlpha = Math.min(intensity, 0.8);
			tween.to(characterGraphics, 0.2, {
				alpha: targetAlpha
			});
			tween.to(characterGraphics, 1.5, {
				alpha: 0,
				delay: 0.2
			});
			// If character is very visible and wasn't discovered before
			if (intensity > 0.6 && !self.discovered) {
				self.discovered = true;
				LK.getSound('discover').play();
				// Visual feedback for discovery
				var originalScale = characterGraphics.scale.x;
				tween.to(characterGraphics.scale, 0.3, {
					x: originalScale * 1.3,
					y: originalScale * 1.3
				});
				tween.to(characterGraphics.scale, 0.3, {
					x: originalScale,
					y: originalScale,
					delay: 0.3
				});
			}
		}
	};
	return self;
});
var SoundWave = Container.expand(function () {
	var self = Container.call(this);
	var waveGraphics = self.attachAsset('ripple', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.4
	});
	self.timeAlive = 0;
	self.maxLifespan = 120; // 2 seconds at 60fps
	self.update = function () {
		if (!self.lastTimeAlive) {
			self.lastTimeAlive = self.timeAlive;
		}
		self.timeAlive++;
		// Expand the wave and fade it out
		var progress = self.timeAlive / self.maxLifespan;
		waveGraphics.scale.x = 1 + progress * 5;
		waveGraphics.scale.y = 1 + progress * 5;
		waveGraphics.alpha = 0.4 * (1 - progress);
		// Remove when completed
		if (self.timeAlive >= self.maxLifespan) {
			self.destroy();
			return;
		}
		self.lastTimeAlive = self.timeAlive;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
// Create arrays to hold game elements
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// Create arrays to hold game elements
var characters = [];
var soundWaves = [];
// Screen dimensions
var screenWidth = 2048;
var screenHeight = 2732;
// Number of characters to create
var characterCount = 15;
// Create characters at random positions
for (var i = 0; i < characterCount; i++) {
	var character = new Character();
	// Position randomly on screen with margins
	character.x = Math.random() * (screenWidth - 400) + 200;
	character.y = Math.random() * (screenHeight - 400) + 200;
	// Set random scales for variety
	var scale = 0.5 + Math.random() * 1.5;
	character.scale.set(scale, scale);
	game.addChild(character);
	characters.push(character);
}
// Create instruction text
var instructionText = new Text2("Tap anywhere to use echolocation", {
	size: 70,
	fill: 0xFFFFFF
});
instructionText.anchor.set(0.5, 0.5);
instructionText.x = screenWidth / 2;
instructionText.y = screenHeight / 2;
game.addChild(instructionText);
// Fade out instructions after a delay
tween(instructionText, {
	alpha: 0
}, {
	duration: 2000,
	delay: 3000,
	onFinish: function onFinish() {
		instructionText.destroy();
	}
});
// Create sound waves when tapping the screen
game.down = function (x, y) {
	// Create sound wave at tap position
	var wave = new SoundWave();
	wave.x = x;
	wave.y = y;
	game.addChild(wave);
	soundWaves.push(wave);
	// Play echo sound
	LK.getSound('echo').play();
	// Flash screen very slightly to indicate tap
	LK.effects.flashScreen(0x333333, 200);
};
// Main update loop
game.update = function () {
	// Clean up destroyed waves
	for (var i = soundWaves.length - 1; i >= 0; i--) {
		if (!soundWaves[i].parent) {
			soundWaves.splice(i, 1);
		}
	}
	// Process character reveals based on wave proximit
	for (var i = 0; i < characters.length; i++) {
		var character = characters[i];
		var closestDistance = 9999;
		// Find closest wave to this character
		for (var j = 0; j < soundWaves.length; j++) {
			var wave = soundWaves[j];
			// Calculate distance between character and wave
			var dx = character.x - wave.x;
			var dy = character.y - wave.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			// Adjust for wave size
			var waveRadius = wave.getChildAt(0).width * wave.getChildAt(0).scale.x / 2;
			var distanceFactor = Math.abs(distance - waveRadius) / 200;
			// The character is most visible when at the edge of the wave
			if (distanceFactor < 1 && distanceFactor < closestDistance) {
				closestDistance = distanceFactor;
			}
		}
		// Remember previous distance for state tracking
		character.lastDistance = closestDistance;
		// Reveal character based on proximity to wave
		if (closestDistance < 1) {
			character.reveal(1 - closestDistance);
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -119,12 +119,14 @@
 instructionText.x = screenWidth / 2;
 instructionText.y = screenHeight / 2;
 game.addChild(instructionText);
 // Fade out instructions after a delay
-tween.to(instructionText, 2, {
-	alpha: 0,
-	delay: 3,
-	onComplete: function onComplete() {
+tween(instructionText, {
+	alpha: 0
+}, {
+	duration: 2000,
+	delay: 3000,
+	onFinish: function onFinish() {
 		instructionText.destroy();
 	}
 });
 // Create sound waves when tapping the screen