ok, then let´s try it by written briefing:
1) the triangular hands of the guys should pe positined in an rightangle to the arms; it looks, as if Mr. Questionmark´s (left) hand is placed in a different angle
2) the right ellbow of Mr. exclamation looks as if it is notfinally worked out (overlaying edge)
3) haicuts: pls use vectorized, 2-dimensional plane haircuts (e.g. here:
http://thumbs.dreamstime.com/z/cartoon-hair-styles-13399191.jpg) instead of brushmarks with slight gradients; haircuts nonetheless need to be unique, special (which has been done quite well in your proposal)
4) length and thickness of arms: pls adjust, so that all arms (length of all elements in total) finally are of same length and thickness
5) shoes: straight, parallel alligned under body
I will select you as winner, maybe exchanging files is much easier.