I've been having a similair bug where I choose to go to the gym and the game freezes but audio continues, im not quite sure what you mean by center tile? Like in the doorway where it asks if im done?
center tile for when you go to leave your room and decide where to go once class is done (choosing between gym, library, music)
as for the gym fiasco, try closing ur game maybe and reopening to the last save file, or just reload the last save file? idk
if all else fails, redownload the game :<
