Crashes a lot

Best game on the App Store next to clash of clans in my opinion, if you like cod zombies you will love this, my only problem is that it keeps crashing on my iPhone, and brand new iPhone. Idk if its me but it crashes once I get 10 minutes into a good round. Causing me to loose the 20,000 points I should probably get from the round

Bman6300 about SAS: Zombie Assault 3