I was making a midget-city-thing, but I figured, this would be much more fun if you'd have to kill players and level up to get to different parts of the world, so I decided then, to post this, how it would work is when you kill a player (like in any mini-game) you get awarded points, at least 1. I thought, well, if you can gain points, why not have a "level" based off the points? Or if not, how about bricks that you can only access if you have a certain amount of points?
I have a feeling a lot of people will like this idea, for once.