Hi! You can do what you consider fair. If the credits are fairly visible, then a single credit will be fine.
https://store.steampowered.com/app/1792700/the_hardest_game_in_the_universe_2/
The music will be used for an extra mode in the game called Electronic Rhythm, this is the game, if you have an email I can send you a key, for you to take a look at the game, and see if the credits I put are acceptable
Cool, thanks! I do not find any time to play anything atm... So, it will be fine. Good luck with your game ✊🏻