A couple of improvements could have been made
First, I would havle liked to have had some diferent sound choices for the keyboard. That would have given you the highest chance of getting a perfect 10 in the interactivity part.
the second thing. It would have been cool if you had assigned keyboard keys to the...Keys... on the keboard (in the flash)...Damn that sounds weird...
anyway, that way, people could at least play some simple chords. Other wise, EXCELENT FLASH! :)