Would it be allowed to change the music in the game files, so that I don't have to listen to the original soundtrack?

Got an idea for a meme category: catch a Bidoof

Would be allowed, when playing on pc switching keyboard for a controller to possibly save a bit of time on upgrading Freddy?

Is the deload that happens when you jump before you get into Freddy allowed in the Any% category or am I just dumb and didn't read the rules enough times to understand them properly? I just want to know before I try to run the Afton ending Any% category.

Are runs done on pc using the Cemu emulator allowed or not?