Teenage Mutant Ninja Turtles+1

This is incredible. A nice use of your space, and the background is quite captivating. It almost seems real... I feel like part of this.
Let's not even talk about the foreground; The shading on each of them as well as the anatomy is exquisite, and any figure studies you have done are definitely showing here. In contrast to most works of this style and medium, this is exceptionally well done.
Not only is this piece accurately drawn, it just has... something to it that really pulls the viewer in, I can't put my finger on it.
My only suggestion would be don't drink coffee (or whatever brown liquids) around your masterpiece.