Switched the game over to my new android phone, crash issue is gone now =D Also, friend reported that the game runs fine on his Ipod touch 5. Considering that my Ipod touch 4 only had 200mb of memory, yea I think it's a lack of memory issue that causes the game to crash.
I assume the game keep certain amount of assets in memory for quick loading, so if you have an older device with little memory it'll crash after certain amount of actions since the app will then go over memory limit?? Ah, who am I kidding; worked fine on my itouch 4 before the ios update so that's probably not it =/