If there is a god, i like the theory of the clockmaker god. He made this meticulous clockwork world/universe but now has to be content with just observing.
The theory is much older than computers. But nowadays it is easier explained with a simulation. As long as the simulation has a consistent internal logic, it is impossible to notice that we are in one (we are on the inside). But if external forces start to mess with it, the ppl inside could notice or there will be chain reactions hard to foresee.