I think that the picture is well done but you made little mistakes in the facial expretion.
You did a great art piece with this picture but you could have done it better ,for example, by making his face look less peacefull. I mean, shadow is a chaotic character but here he looks so calmed down.
The outfit is really good and with lots of details, but the most shocking part of the picture is the background; it feels really dynamic, full of red light and shadows.
The concept of this work is quite original but i have seen others with a similar one.
To sum up i think you did it well but you could have done it great