First off, I'm new here and want to improve my skills at pixel art, I heard this was the place to be for the more serious critique

I created this fan art piece for fun:



It's from an Anime called the Guyver. First I drew the outline using various references, then traced it more or less with a one pixel thick pencil. After that, I coloured the main parts. Then I started shading the rough areas and finally added the highlights. I used dithering to add more depth.

I plan on doing more of this stuff in the future, as I really enjoy pixel art. Anyway, I'd like to hear your opinions

Any feedback on color pallete, technique, structure, proportion and the like is very welcome!