It's a little tricky to judge body proportions for a heavily-clothed character, but he looks alright compared to the original illustration. I'd say his hands look bigger in the illustration, so scale up his hands a bit in the model. Also, increase the width of his nose bridge and add more fat to his nostrils so his nose looks more puffed up like the original, and try reducing the space between his eyes as they look little too far apart. It's looking good though. ^^
