I downloaded the free wizardry app to get a feel for the game. However, it crashed and I can't get it to start up. I reset the phone and deleted/reloaded the game. It worked again and then crashed again on one of the menus.

Is there a problem with the ios5 software or is there a general problem with the iPhone that's causing the problem?

I really want to play but I can't re-download the app every time I play.