yeah I made a weird one about cellular automata (Conway's Game of Life): http://www.ludumdare.com/compo/ludum-dare-30/?action=preview&uid=28454
It has balancing issues that need to be resolved... it's too easy to get one of those virulent patterns (where a cell is born if it has 1 or 2 neighbors on) and keep it going forever. It's also easy to never get a good rule from the start and the pattern will die out within 4 or 5 worlds. (it starts with Conway's classic rules and mutates them randomly whenever you branch off into a different world)
Also the game screen is called MainMenu.java and the main menu screen is MainMenuForRealsYo.java #gamejamcode
Not sure connected worlds was such a good theme though. It inspired some interesting ideas, but there isn't that
much to do with it compared to, say, "beneath the surface" from last LD.