For some reason, this reminds me of Jamie Hewlett's Gorillaz art.
Love the hard ink style, character's silhouette form, and simple colour scheme with a grungy background.
Some little details that are a little bit off, in my opinion, are things like his hands aren't really the same size. Fingers in right hand are larger than left.
Unsure how his right leg connects to his hip.
His overall balance with his weapons seem a little too unnatural, especially with the axe and how he isn't really using his left leg to support the weight.
I mean, you could argue that the dune winds balance him out, but if there are winds, his clothes don't really appear to be blown by the wind either.
Still, I love this kind of stylized work. Good job!