7.5
The idea of making playable instruments has been done extensively before in flash. It has just not been recently. It is a quite promising on Newgrounds and if done well can be pretty fun.
The look of the piano/keyboard is really nice, it looks almost like a real keyboard. The different buttons, varied colors, all help make for a neat aspect. The only problem is that you can use them. If it were possible, that would be something really neat. Perhaps in a future version, you could have your work as an additional selection for the viewer to hear. Just an idea...
Ryan