KR- Sonic 3D Diamond Dust Hmm...
Jeez man, after learning a lead like this there's so much you could do with it. You should've evaluated the song carefully and seen what kind of awesome remix-type stuff could go with the melody. All in all the song is terribly boring and the piano has a detuned effect which is driving me crazy. Good job though, I know how hard it is to try remixing songs on your own (I assume you didn't use a midi...?). And try adding some drums, that would seriously spruce this up.
Good luck for the future. Diamond Dust Zone was one of my all time favorite Sonic songs too.