I'm no expert on facial structure, but you may want to try thinning the eyes, bringing the cap down a pixel or two and getting rid of that straightline from the face to the edge of the cap
right now the face is sort of baloon-y and your facial structure is more defined.
oh, and the eyes just look big to me >_>
The proportions on the legs look all wrong from my perspective, but maybe someone with more knowledge can comment on 'em
other than that: the torso, arm, and what you have done so far is rather nice.