Hey there.
At a glance I only noticed something direly off about his back leg. I thought about just telling you about it, but figured a solid black paintover would work better. Well, my hand kinda wandered and corrected what it didn't like.
i will save this world
/
The back leg was from a completely different perspective, as I said before.
You had pillowy shading going on, which didn't really work on clearly defining just what you were trying to represent.
The face was blurry. Also, THOSE EYES. It may look normal to you, but...
Highlights everywhere! The highlight on the pant leg kinda works well, but It's the pants and that's not where your eyes should really wander. also highlighting any vertical rectangles near the crotch area may hint at penis.
I gave him a haircut. two spikes look like horns. orphans are always lawful good. But didn't really touch it other than that. It's a bit noisy, I think consolidating the spikes a bit would take away some confusion.
The belt. Did not know what was going on, I kept your silhouette but got rid of the nasty break. You should invest in a buckle! Also indented the belt on the left by one pixel, to break up vertical contour.
Anatomy. Those arms. Do they look naturally proportioned? I interpretted the stumpyness as foreshortening with a fist pointing forward. Back arm can hang loose to form a nice contour.