I think it's good but I feel it would be more apealing if your gradient blends looked a little more matalic.But it's a good design!

a few of the objects have outlines. it would look a little more realistic without them. i get a little lost in the fore shoulder and collar bone area, i think because of all the "parts" and joints that would make them up.

the forward shin, the top of the hip and the heel on the back foot look really nice. i think you nailed the metallic look on those parts. the shadows are great and the diagonal horizon really make the piece, overall, more dynamic.

great job for your first illustrator piece.

I think the bot looks awesome. My only crit would be the background and lettering could be a little more complimentary to the piece. It kind of looks like it was an afterthought.