Quote: "- it is not Guitar hero game, it should be a serious way to learn reading music, so the hit zone is the keyboard, not the moving notes."
Fair enough, its your game... Its funny though, I have literately just started teaching myself piano a couple weeks ago. I found an app very similar to this. One enhancement I would have suggested was to have it scrolling, which is what you are doing... Just to be clear though, by hit zone, I wasn't suggesting you click the moving notes, I meant you click the keyboard when the note is in the 'hit zone'...