basically, you just try and keep the station running smoothly with your online shipmates until someone inevitably screws something up and the whole thing just spirals into madness.
It's like an open ended RPG where you can do anything... while screwing over everyone else on your ship.
http://www.penny-arcade.com/forums/viewtop...hp?t=1073822797 a topic on it that describes how to play, controls, offers screens for newbies, and has links for downloading.