Hey the music use is kinda disrespectful in the current state. You give credits to yourselves but not the musicians inside the main menu and you ignore NIN Ghost's cc-by-sa's terms, like the game having to be cc-by-sa-nc [MAYBE. I'm not sure about it and I'm not a lawyer and lawyers are probably not sure either] and having to provide detailed attribution (song title, sometimes url to source). Also not sure what license the freemusicarchive stuff is but might suffer from similar issues.
[feel free to delete this comment, I would do the same esp. once fixed]