That's interesting, I like that everyone's code has to be public on github so if you get relentlessly destroyed you will at least have the chance to learn from how your opponent works.
I haven't yet tried the game itself, but the testing page mentioned on the frontpage seems rather important, and I think I'll hold off on trying the game until that is implemented.
Also I think it would be good to mention at what time (in which timezone) each day the code is pulled and the battles are run.