Level 0 doesn't actually take you to the Frontrooms, it takes you to either Level 1 or Level -1
You can just find a fire exit. If the backroom is real, then so is Level 0. You can get out there and there is no other levels. Just find an exit sign
@M3Builder18 it's such a small chance that it's barely plausible, but if you can find that, you've ran out of luck man.
You can never run out of luck man. You just need to make one.
What do you think?