The latest update 2.2.1 solved the problem of not starting/crashing the game, at least on my iPad3 running iOS 7.1.2. No guarantee it wil work on iOS 8. All my paid and acquired items and upgrades were still available and I didn't even make an iCloud backup before. Unfortunately, as said in the release notes, Matryoshka is weakened, which means for me 130 points less health! That feels like a rip off, since I worked hard for all the upgrades which also took a LOT of time to complete. Why?!? Now it's even harder to win the PvE battles. It also looks like Roxy and Rico have less health now, but i'm not 100% sure.