Just go with Cocos2d. There is certainly not a dearth of Tic-Tac-Toe games in the app store however when I was first learning iOS development I built one of the

Just go with Cocos2d. There is certainly not a dearth of Tic-Tac-Toe games in the app store however when I was first learning iOS development I built one of these for a client and it did not take much longer than the two weeks you describe. (Though I had a little help with the art and the Ad integration) I'd recommend you collect the art and sounds you think you will need from iStock photo ahead of time and I'd push you to leave room for some ads in the app to give yourself an idea of what putting together a complete app that can generate some sandwich money takes. (Or figure out what you could sell via in app purchase) Make it universal if you can as well - anything to get it in more categories on the store. Also go look at existing games that do well to see what they are doing well and poorly. Writing the code is only part of publishing apps and Id say probably not the most important part. Also, for fun google "Tick Tack Toe in lisp" I found these to be neat little programs to read though not especially relevant to the production of the game :)