Edited some things:

I can't really remember everything I did, but I'll try.
--There should be an indent below the brow on the nose. Put a shadow there to represent that.
--Shortened the noggin.
--Ensmallened the lower lip and moved the lips and chin upward.
--Moved the eyes closer together. I also changed them a bit--hard to describe, and I'm not sure if it's what you wanted, but I kind of put in eyelids, which made the actual eyes in shadow. Don't know if you want to keep that or not.
--Un-puffed his cheeks, which sort of made him skinnier. Again, don't know if you were going for a fat person. But yeah.