iPhone gamers are not at a lack of things to do on their portable device. There are thousands of games available, with dozens more released every week. That said, about 98% of them are terrible, so it's no shocker that anything of quality that squeaks through Apple's certification program is worth paying attention to. In this case, it's Tarver Games' Ghosts Attack, an interesting shooter with GPS functionality. Does it break from the norm, or is it another flawed handheld experience?