About the guy in the background; why are his legs facing a different perspective than his upper body? I can understand that drawing things that are small and intended to be viewed from a distance can be difficult, but it's not like there's not a solution to it.
Try drawing the smaller elements on a different piece of paper on the equivalent scale that you're using now, artiscope them and shrink them down to fit your scale.
The face is just, well a face with some good coloring.
The background looks lovely, but I can't help but feel that it was done in 3D software. It looks too perfect to have been done in Flash, Fireworks, Photoshop or even Illustrator.
WARNING TO EVERYONE:
DON'T EVER REVIEW THIS KID.
Unless you want every single piece you've done reviewed as some sort of crazy revenge. He doesn't really know what he's talking about, and he'll put up the pretense of being constructive so he can feel good about himself. But read his reviews and ask yourself. Does it seem like he's trying to help? Or like he's trying to look like he's trying to help.
Longer explanation here:
Seriously. All my work.