Unstable with iOS 7

It seems that since I have the iOS 7 on my iPod 5G, the game has become unstable, it crashes often, hangs a lot during stages, etc. Square, please, try and fix it, I really like Theathrhythm on my iPod and it has become hard to play it properly now :(

Xirvet about THEATRHYTHM FINAL FANTASY, v1.0.0