I made an art app/game thing over the last year called Toenail Swim which is now in the Apple Store.  It will run on iPhone or iPad, probably cooler on iPad, and remember to wear headphones.  The game is free, I wasn't as happy with this one, but wanted to finish it because I put a lot of work into it, but I don't want to charge a dollar or whatever for it.  Android version should be out soon.