Very nice use of shapes and lines! My only gripe is that the colors are somewhat flat. Not that they're bad colors that you picked, but that they bleed into each other a bit. That's one of the areas I have trouble with in that it's difficult for me to get my pieces to pop. It's helped me to look into hue shifting and get out of my comfort zone when picking colors. You can get some great ideas sometimes by just going wild. And remember that mistake making is memory making! Keep up the great work! 
Looks pretty good. Very dark and grim.