Menus are not part of the challenge. I don't know if thats a disqualifying measurement but just letting you know before the submissions are due
WRONG
It is allowed. Quote by jam host from Discord:"Pause menus, settings, UI buttons, and menu navigation can use normal controls. The one-button rule applies to gameplay only."
Oh ok, I just saw a post from the creators so I just went with that but thanks for letting me know :)