Great job, very authentic.
face distracts from the overall character. looks like 10 mins work and he looks fairly mentally disabled
Nicely done concept, well presented and reads very well, design is somewhat generic, but that's not necessarily a bad thing, means you picture is also easily relate-able. You have achieved a very nicely polished, professional looking image here, so well done.
Maybe you could do one with multiple angles to view the character from, front, left and or right side and the back? either way, like i said, really well done.
thanks for sharing and i can't wait to see more!