public static void muteMusic() {
		if (!isMusicMuted) {
			stopMusic();
			isMusicMuted = true;
		} else {
			try {
				switch (Game.getInstance().getCurrentLevel().getLevelType()) {
				case Level.LEVEL_SIMPLE:
					SoundEffect.MUSIC_1.loop();
					break;
				case Level.LEVEL_MID:
					SoundEffect.MUSIC_2.loop();
					break;
				case Level.LEVEL_COMPLEX:
					SoundEffect.MUSIC_3.loop();
					break;
				}
				isMusicMuted = false;
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}