Game developer Terry Cavanaugh has released a few really great games over the years -- in addition to the popular PC title VVVVVV, he's also the man behind iOS' recent (and terribly difficult) hit Super Hexagon. Right now, he's in the process of trying to release an old experimental game he made called Don't Look Back (which you can play online in Flash right now) on iOS, but he's hit a speedbump. Apple rejected the app, unfortunately, though not because of anything in the app itself. Nope -- Cavanaugh, in the app's description, happened to point out that Don't Look Back didn't have "in-app pur
