Board Thread:Out-of-Topic Threads/@comment-13892511-20140810174903/@comment-25220796-20140813125146

http://support.gameloft.com/OnlineAndSocial/showSelection/321/

Found this over there: Please make sure your operating system and game version are up-to-date. If your game still crashes upon launch or after playing for some time, here are a few possible solutions. First, try a simple soft restart: Hold down the lock button located at the top of your device for a few seconds, then slide to power your device off when prompted. If this does not help, try a hard restart: Hold down the lock button and the home button for a few seconds until you see the Apple logo. Ignore the prompt to power off and just keep holding those two buttons. This method involves a substantially longer restart than the soft restart mentioned earlier. If neither the soft nor hard restarts work, try deleting the game from your device and re-downloading it. To download your game data back onto your device, make sure you log into the same social network account as before (Facebook, Game Center, Gameloft LIVE!, etc.).