Need a little help on this, I'm not sure what to add to it, and what to fix!

mapping on the eye need work.
mouth look weird.
and WTF is that white thing on the mouth (the lower part) is that teeth ? if yes, that weird.

but it's good.

7/10

Uh, not really sure, it just looked boring with blackness, so I added something xD


Also, bear with me on this, it's a 3rd attempt at making a head texture. o..o
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Updated:

I preferred the tongue in the first version. to properly map circle shapes just reduce width by 50%. In other words make them half as thin as you want them to be. I would raise everything about 8 pixels. Another area of focus are those cheeks. The mouth contradicts the eyes when it comes to the shape of the cheeks. I would look up the expression you're trying to draw and try to copy it a little closer.

Working on mapping the eyes now! And I agree, I kinda liked the tongue better.
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Update:

Tongue is back, eyes mapped, moved up a bit, and added cheek crease thingys!