An iteration is loading the roms, setting up the emulator, running the game for a short period, and then shutting down which also updates files.  It's really testing our code to make sure we write files properly and keep track of everything properly on a long-term basis.  The Alpha testers and I have let the game run for days without shutting it off and had no problems.  I wanted to make sure no problems would creep up after a few thousand plays.