I feel like there's something off about the arm in the background. Judging by how thin the character is it looks like more of the arm should be exposed, assuming it's in a resting position. Like maybe an elbow from the back, or a hand on the platform she's sitting on.

Very clean, I like it. Did you use a filter of sorts to achieve such a polygon effect?

I never review based on what I like to see, but rather how much you followed your style, and if there's any errors in the picture. In that sense this is perfect.