I'm not quite sure, but I lean towards it being "god." It could also be us playing the game though. In an actual game you could purchase or get rewards for new content. It would be like questing I suppose. If you did the right things, beneficial changes would be made.
It's also a bit like karma I suppose. Although, as this thread started off explaining, I don't believe karma always works. Bad people do NOT always get what's coming to them. Good people have to fight and resist... and sometimes die. You can be a very moral and nice person and be taken advantage off for your entire life.
There's a good video out there about the simulation concept:
It includes cussing, so be careful opening it.