This one's hard for me! I think of a technical level, you are probably a little above my own skill. If I had to crit anything, though, I would say this character could be posed more dynamically.
I'm not familiar with your art, so this could make sense fo the scene or something, but with an abstract style you always have more room for over-the-top posing that can make the character more alive.
here are a few action poses ripped off google for an example.
You can also add more visual interest by changing the postion of the "camera." So how might this look from below? is it more dramatic? How about with more foreshortening in the arm, zoomed in? or from above?
Theres tons of potential!
