^What he said about the arms, and fingers are too short, too. Then, eyes and ears are incorrectly placed, they need to be placed somewhat lower. Have you seen any people with eyes on their forehead, and so big chin? And about the shading, compared to the guy's face, shading of clothes is too dramatic.
And anyways, mouth shouldn't be just a straight line.
...But, it's a good start. Better than the ugly smuglies I used to draw six years ago... >___>;