Angry Birds Star Wars II has a feature where you can "scan" some special plush Angry Birds Star Wars toys and "teleport" them into the game with the camera. This is useful when you are out of birds, as it gives you another bird to try and win with.
I would use iTunes to backup iPod, restore the iPod software, and restore from the iPod backup you made. That would fix the freezing issues related to your iOS update.
8.2 is not supported by Apple yet, I think they will start supporting it soon though.