Alright, the backrooms may have been created as the universe was created. By a few broken stars warping things around them, including apart of the reality we live in. These broken and uneven stars are like blackholes, however they do not function properly as blackholes. And these stars interacted with earth, creating the entrances to the backrooms. And apart of earth fell into the backrooms, and these entrances still exist and may first created the levels with high vegetation like level 3920 or level primal. Meaning that level 0 wasn’t the first level to be created, it was level primal and level 3920. The Void was basically the base for the backrooms level, and something must’ve created the levels manually. Meaning that a possible Class omega civilization from a universe possibly dying rn as we speak build the backrooms manual until they were wiped out, maybe their creations just float in the universe they used to inhabit until they figured that the backrooms existed. Maybe they ARE the Supernova Dominatics themselves, who possibly made the entirety of the backrooms themselves. Maybe they found it before and waited for us to come, so they can wipe us out.