Nice block style you got there. It's great and you did it with only 1 layer! :D.
One thing that you can improve on is, blending around more. For example, the skin on the face seems blocky and so does the hood.
I'm not as experienced as you, so that might just be your style or how you wanted it to be. But ye, that's one thing I noticed.
Great artwork, and keep doing what you do!