Quick answer: build a maze, place monsters to catch entrants, and collect buildings plus stronger monsters for more cash. Monsters are described as working offline; exact rates are unknown.
Confirmed cash loop
- Official: build a Backrooms maze that people can enter.
- Official: place monsters in the maze to catch people.
- Official: collect cool buildings and strong monsters for more cash.
- Official: monsters can catch people while you are offline.
Make the next purchase measurable
Record your current cash and one visible maze change, then compare the live result before making another purchase. This does not create an official formula, but it prevents several changes from being mistaken for one improvement.
Buildings versus monsters
The official description associates both collected buildings and stronger monsters with more cash, but it does not state their relative return. Treat them as separate upgrade paths and compare only live values.
Unknowns and availability
Unknown: income per catch, offline duration or cap, monster prices, building multipliers, visitor flow, and an optimal layout. Current playability is also unverified because Roblox reports no running experiences.