Wow. I just finished listening to it and it makes me envious of what you can do with the piano. And then your cousin can play that well too? That makes me REALLY envious.
Anyway, everything in this little song is amazing to me. Take it from me, because I listen to film and classical music four hours every day. It makes me really want to take up piano again. Again great song, and I want to hear more and more and more from you in the future.