Maybe the extra floor could be placed between the prison and surface floors, so taking the stairs up from the prison puts you in the barracks, and taking the stairs down, or the door in from the surface level puts you in the barracks. The prison could be farther beneath.
EDIT: And this thread should be moved to "Suggestions".
Last edited by Stabbey; 24/10/16 02:06 PM. Reason: move thread plz