I have been thinking about this. Definitely not a Physicist or even a Scientist, but how do we figure out the world that the simulation occurs?

I think one lead we can have is that simulations are called simulations because they try to emulate the real world (the one simulations are running). By observing from inside the simulation what kind of input and reaction the "God" people has when we output something, we might be able to understand the "real" world better. It's like the "people" in the Sims game -- given they are of their own mind, they can figure out some rules of our world.

But then how can we jump out of simulation to really really figure it out?