Well some things I've seen in the sheet look pretty good. But other things just don't look very genesis-ish.
Things like the present, background in the top left corner, the cart that says "go!", water, the sign, and the (stone or papers) need better shading.
Also, the Robotnik sprites need improved like the orange fire should be blue
And sheet needs less empty space so it won't take up space
Other than that, it looks like it might turn out pretty good if you improve some things
EDIT: Oh, and another thing, just because you post something doesn't mean that someone is going to get a response in the next 30 seconds your post is posted. You need to be patient.
Things like the present, background in the top left corner, the cart that says "go!", water, the sign, and the (stone or papers) need better shading.
Also, the Robotnik sprites need improved like the orange fire should be blue
And sheet needs less empty space so it won't take up space
Other than that, it looks like it might turn out pretty good if you improve some things
EDIT: Oh, and another thing, just because you post something doesn't mean that someone is going to get a response in the next 30 seconds your post is posted. You need to be patient.