-Doha looks genuine about not remembering making noodles for Bada, so maybe he is a player like the rest. But I think he is a natural serial killer. A serial killer trapped in a serial killer game.
-Other theory, all of them are trapped because of the revenge of someone. Doha? Or other character? Their original bodies did something in the real world and now they are suffering, kind of like Black Mirror.
-Doha being the dev or admin theory is possible, but I don’t bet on that. But it is weird he knows hidden passages in the walls.
Something for sure is that Doha is obsessed with Bada and he doesn’t plan to end this soon.