really impressive, a lot of detail packed in there with so few colors.

This is pretty good I might have to try doing a figure this size and detail.

Looks really great. If I had point out anything wrong it would be the shadow underneath him because it needs to be more to the right instead of centered  that way it could agree with the light cast.

a lot of it looks great just need to fix that arm even with forshortening that arm need to be double the size. Also on his backside there is this black shadow outline that doesn't agree with those suns behind him, try a rim light instead.

@Gecimen - I normally do more advanced illustrations http://luneder.artstation.com/ so as long as there is feedback it should not take me long to catch up to monster pixel artists on here.

@Gecimen - yeah I need to play with texture some more, this one was mostly an experiemnt with using only 16 colors. The horn I didn't notice until you pointed it out but I forgot to put that rim light on to better place light direction.

I just did a quick edit to it just now to give it some texture by changing how the values blend. Also added the rim light that was missing on the horns.