I was playing angry birds a few days ago, when my itouch died during gameplay. A bunch of these dark lines started appearing on the screen very close together, just before it shut off. Now when I try to launch the game it crashes :/ Has anyone encountered this before on an app? All my other apps work, I assume it's my ipod that's the problem since I was on this app when it happened. I'm worried I'll have to reinstall it. If I choose 'no' when it asks me if I want to remove it from game center as I'm deleting it, will all of my progress be retained? I could really use some help on this.