Can you tell us a bit more about this guy? Is he human? We might be able to help you more.
Right now the main things I see:
- He doesnt appear to really have joints for his arms or legs, they look elastic.
-The left boot is pretty small compared to the right one.
- His shoulders seem to be set forward past his neck/head.
- You may want to take another approach to the shading on the right boot as well, it looks flat.
gl!