Easily 5/5. Great pixelart, the anatomy (although over proportioned in well chosen places) look realistic and I really like the "locked" sign. What impresses even more is the roundness of the body achieved with so few shadowcolors. I recently started playing around with more cartooesc shading but this is beyond that as the image does not look cartoony, just low resolution. Really well done. The fact that you've brought so much life to the eyes with so few pixles is also great.
Overall amazing work and I can't wait for the clothed version for more of this "pixelporn" (pun intended) ;)
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