Fixed a bug that the BGM volume for boss battles could not be adjusted. Fixed a bug that the sound crackling is suppressed when firing at high speed. Fixed a bug that caused the reinforcement screen to appear twice in the training area. [img]https://clan.cloudflare.steamstatic.com/images//44871414/2f2f543ee57fb3e8db1cb8fd66754a9ddfb9fe00.jpg[/img] Added a button to turn off screen shaking.