It's messy, but it's a good start.
-The outlines of the cape especially stick out--if it were mine, I'd even get rid of them.
-The lighting (highlights/and shading) is messy. They feel randomly placed, and they don't seem like they're pulling enough weight--they aren't showing depth as well as they could. Maybe a contrast thing?
-The face could read better...feels very blurry.
Otherwise, its a pretty sound design.
I'm curious to see the reference picture, though.