Hey Matt! This is awesome! A couple things I might say is it feels as if all of the shapes don't match up / relate to the things they're connected to, and the silhouette could be a little stronger. Using the left leg as an example, it feels like the knee cap should be facing further away from us. In terms of silhouette, when you black it out it his left arm is sort of lost. I'd recommend doing something with it to solidify in fact that it is an arm. In the draw over below I raised it up. Excuse the crudeness lol, did it with a mouse

For me, what's off is that your character and your background are not on the same perspective. If i see the face of the monster in the left with this angle, that means i am really close to the ground, so the character should be more "angled".

Hey Matt, This is cool, and solidly drawn. The only thing that is bothering me is his weight distribution and his left arm. I did some quick iterations of your pose to show you some ways you could deal with his arm and his stance. I hope you find it helpful :)