There are a lot unneccessary colors (it's 255 colors not 64 btw.) and quite a lot banding. Try again with 16 or less colors (or 8 might be even better for practice reasons), and cleaner lines.
Anatomy, composition and colors are good, but pixel technique wise it's far away from satisfactory, you might should consider reading some pixel art tutorials for beginners.
Lots of aliasing, but the color, anatomy and overall warmness is incredible. :)
Looks good, this remind me Murumasa. Nice shadding on the hair and face.
Howewer you can use less color ( the thigh for example), and the left arm need more AA.
at 255 color I'm going to have to send this back, please amend and resubmit.