Almost Ultimate
Strictly speaking as a die-hard Sonic fan (I can tell you're one by the quality of your work), this is great, but not perfect, but then again you never said it was. Anyway, just a few things I'd like to point out.
1:Great Level Design, I can tell you've put some thought in this, but...
2:Where's the speed? If anything makes Sonic famous, it's that^
3:I'm totally digging the blend of old-school Sonic sprites in with the new Sonic Advance ones, and...
4:This one's not so big or important, but in the Sonic Advance games, every character has special Spring board moves, and it would just please me to see those.
Finally, you did good, kid. Real good, see?
-LOS