I will be omnipotent? Huh, that's a stretch. I can barely understand the relatively simple programs I write. If there is a human being who understands his own code completely, in a large system, I'd like to meet him.
Well, you don't need to understand your code fully to effect changes in the simulation. The point is that it is a simulation, and you control the code. So you'd be omnipotent, just not omniscient. You know, that scenario would actually explain a lot about this world. The reason why evil exists is because God did create a rock too heavy for Him to lift, and that rock is us. Be patient, he may be in the process of debugging the system. :p