Nice, I really like how you recreated him running through one of the series' iconic checkered "shuttle-loops" in the Green Hill Zone.
Also nice slightly upside-down perspective.
I also like how you mixed in some of his "classic chubby" design, with his "modern green eyed" design to, even if that wasn't intentional.
(Y'know, as odd as this sounds, there's some insane Sonic fans who get angry whenever Sega releases a game where he has green eyes. Which seems funny to me, because I always liked the green eyes personally.)