if someone made a map like of the picture in family guy Crazy Stairs, its a famous painting, and it would be a very fun map. here's a picture im aware that u cant walk upside down but you could make a teleporter to a separate room with stairs above you to make it look like your upside down
well i think to do it, you would have to make three rooms, and you can only travel on one set of stairs in each room, at the top and bottom of the stairs there would be teleporters to the stairs in the next room and so on...