I've always liked when these kinds of games go to ridiculous sizes, but I'm probably going from the wrong direction. You'd have to first create the actual gameplay system, and only then paint it with descriptions and the (sort of) lack of an upper limit.
I actually tried starting by making an actual game, but I found that it takes a lot of patience, and more importantly, willpower to work on such a thing when you could just make a list of increasingly large things and then get too horny to work.
:(
Maybe I need a business partner.