Godville is a satire / spoof on the entire RPG genre. You don't really play it. You sort of watch it being played.
Basically, you are this "god", and you create a "hero", who will go fight in this world and do quests. This is a text game though. Your only control over this hero is "encourage" or "punish". And you can only do this X times per Y hours. Oh, and if he dies, you can resurrect him. But that's it.
So periodically check in on him and see how well (or badly) he did, and give him a little encouragement (or punishment) as needed. Lots of encouragement makes him nice, while lots of punishment makes him nasty. It's all up to you.
It's cute, and you should try it, if just for the fun of it.