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

/**** 
* Classes
****/ 
var SoundCharacter = Container.expand(function (characterType) {
	var self = Container.call(this);
	self.characterType = characterType || 1;
	self.points = self.characterType === 'special' ? 50 : self.characterType * 5;
	self.lifetime = 0;
	self.maxLifetime = self.characterType === 'special' ? 5000 : 8000;
	self.isClicked = false;
	var assetId = self.characterType === 'special' ? 'specialCharacter' : 'character' + self.characterType;
	var characterGraphics = self.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.spawn = function () {
		var margin = 100;
		self.x = margin + Math.random() * (2048 - margin * 2);
		self.y = margin + Math.random() * (2732 - margin * 2);
		self.alpha = 0;
		tween(self, {
			alpha: 1,
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 300,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(self, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 200
				});
			}
		});
	};
	self.playSound = function () {
		var soundId = self.characterType === 'special' ? 'Specialsound' : 'Characters1to5sound';
		LK.getSound(soundId).play();
	};
	self.update = function () {
		self.lifetime += 16;
		if (self.lifetime >= self.maxLifetime && !self.isClicked) {
			self.fadeOut();
		}
	};
	self.fadeOut = function () {
		if (self.isClicked) return;
		tween(self, {
			alpha: 0,
			scaleX: 0.5,
			scaleY: 0.5
		}, {
			duration: 300,
			onFinish: function onFinish() {
				self.removeFromGame();
			}
		});
	};
	self.removeFromGame = function () {
		for (var i = characters.length - 1; i >= 0; i--) {
			if (characters[i] === self) {
				characters.splice(i, 1);
				break;
			}
		}
		self.destroy();
	};
	self.down = function (x, y, obj) {
		if (self.isClicked) return;
		self.isClicked = true;
		self.playSound();
		LK.setScore(LK.getScore() + self.points);
		scoreTxt.setText(LK.getScore());
		LK.effects.flashObject(self, 0xffffff, 200);
		tween(self, {
			scaleX: 1.5,
			scaleY: 1.5
		}, {
			duration: 150,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(self, {
					alpha: 0,
					scaleX: 0.3,
					scaleY: 0.3
				}, {
					duration: 200,
					onFinish: function onFinish() {
						self.removeFromGame();
					}
				});
			}
		});
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2c3e50
});

/**** 
* Game Code
****/ 
var characters = [];
var spawnTimer = 0;
var spawnInterval = 2000;
var minSpawnInterval = 800;
var speedIncreaseRate = 0.98;
var lastSpeedIncrease = 0;
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnCharacter() {
	var characterType;
	var random = Math.random();
	if (random < 0.05) {
		characterType = 'special';
	} else if (random < 0.25) {
		characterType = 5;
	} else if (random < 0.45) {
		characterType = 4;
	} else if (random < 0.65) {
		characterType = 3;
	} else if (random < 0.85) {
		characterType = 2;
	} else {
		characterType = 1;
	}
	var character = new SoundCharacter(characterType);
	characters.push(character);
	game.addChild(character);
	character.spawn();
}
function updateDifficulty() {
	var currentTime = LK.ticks * 16;
	if (currentTime - lastSpeedIncrease > 10000) {
		spawnInterval = Math.max(minSpawnInterval, spawnInterval * speedIncreaseRate);
		lastSpeedIncrease = currentTime;
	}
}
game.update = function () {
	spawnTimer += 16;
	if (spawnTimer >= spawnInterval) {
		spawnCharacter();
		spawnTimer = 0;
	}
	updateDifficulty();
	for (var i = characters.length - 1; i >= 0; i--) {
		var character = characters[i];
		if (character && character.update) {
			character.update();
		}
	}
};
spawnCharacter();

===================================================================
--- original.js
+++ change.js
@@ -40,9 +40,9 @@
 			}
 		});
 	};
 	self.playSound = function () {
-		var soundId = self.characterType === 'special' ? 'specialSound' : 'sound' + self.characterType;
+		var soundId = self.characterType === 'special' ? 'Specialsound' : 'Characters1to5sound';
 		LK.getSound(soundId).play();
 	};
 	self.update = function () {
 		self.lifetime += 16;