It feels unfinished because of the cut-off legs. I think you should add them in! The sprite also feels unbalanced because the feet don't look like they'd be underneath the character's centre of gravity, they'd fall backward, on their butt.
Your colours could use a little more contrast, especially the browns. Some parts of this look essentially flat-coloured at 1x, which means all that shading you put work into isn't visible, and it's all because the colours blend together.
Actually I already added the feet but they somehow looks weird as hell, but I guess I'll repaint it somehow. About the colours, yeah I'm not very happy with it tho, I'll see what I can do :D. Also he does looks like he's doing a squat lol.