Wow, this is a really strange piece. It seems like one of those Untoon things. I'm pretty sure you were trying to make it realistic. His arm looks more like a cigarette butt. I'm not sure what the face in the background is. Maybe I'm just not that familiar with the Mega Man mythos.
I love the sprite version in the lower right hand corner. It's the little things that make this so good. I also love the ground. It shows wonderful perspective. Kind of weird, but still great!