My friend turned me onto this game back when I still had an iPhone 3, and have continued to play on my 5. I really enjoy just jumpin around and blowin up those little monsters. Some glitchy things happen sometimes as others have mentioned, such as the grenade launcher failing to fire, or getting stuck on a ledge. Those arent a huge deal. Ive even grown accustomed to playing quite well on the 5 despite the game not filling the entire screen. However, there is one glitch that continues to interfere with my ability to play. For some reason, on occasion the game will pause when I rapidly change direction and fire my weapon in order to save my character or clear the path. Then when I unpause, my character almost always instantly dies. Its frustrating knowing I would have been fine if the glitch hadnt occurred. All in all, a great game! Ill continue to play despite the glitches. An update is definitely necessary, though.