hiya, maybe the simplest solution would be to find or make a low rez bitsy font? maybe there is a bitsy hack for this also, but make sure to use files compatible with bitsy 3d https://github.com/seleb/bitsy-hacks/tree/v16.0.3/dist
otherwise you will have to search through the bitsy codebase a little. i haven't worked with it for a couple of years so i can't really give you pointers to where exactly stuff is