I guess it could have used a background, but it's still an awesome picture. You kind of look like Egoraptor. I didn't even know there was such a thing as Monthly Feature. We should do that for games and cartoons! It's great to see snow like that. The green color seems to work really well.
One cool thing is how there are so many individual parts in the tank. They're not really significant, but are great to look at. The tank could just use that gun on top. You have a great expression, even if it's not much of a face. The background's a nice little touch.