Got the game loop in.
http://www.youtube.com/watch?v=BTxKJaCEhl0
I think that is probably the shortest amount of time that it has ever taken me to get a full game in. There is still a bunch of tuning that needs to be done, but so far so good! I think this is a pretty ok version of crossfire, and it also plays a bunch like FingerBattle, one of my favorite two player iphone games.