I remember having a fun time playing this game with a friend many years ago, when the game was brand new.  Basically you go around shooting people.  Well, the computer pushes you to the next area after you are done shooting in one area, but that's okay, any video game where you get to let loose and just shoot things is fine by me.  Though I don't recommend doing that in real life.  You'd get in trouble!  I love this game and you should to!