As an artist and an animator
That sir, was fantastic. I must say that you do have a real talent for and drawing my childhood hero. Haha, excellent job. Next time, (if there is one) try expanding it further! I know this must have taken forever, but i'm sure you could whip up a backround just like this, maybe throw in an enemy, then sonic could take down said enemy. I don't know... *is just ranting*
It seems i've gone off topic... Nice job! :)