Second: the simulator will often be extremely powerful. Many simulations give the simulator huge control over the simulation’s state. Depending on the simulation, there may be limits to this control. For example, someone running Pac-Man can’t rearrange the whole state of the world or change a Pac-Man world into a World of Warcraft world at the press of a button. But many simulators with access to the source code and the data structures involved in their simulation will have near-unlimited powers over the worlds they create.
