I would of put this with my other finding of Aero Synth Evolution but meh would fill up to much space so.. once again, i was looking on the Apps Store and came across a game called FingerPiano. comes with HEAPS of classical songs but some are short and some are long but all in all it's an awesome game.
I think this App was about $3. I can't remember but it is really a good learning/game.
FingerPiano: Fake Keyboard Mania For iPhone 
