How about positive feedback?
I like the drawing and agree with Peter that the shadow on the nose on the figure in the forefront is really well done.
You get a real sense of the theatrical lighting you speak of, and I wonder if the figure in the back would not benefit from some better definition? It feels a little less solid than the figure in the fore...this may be intentional, not sure. The far eye on the back figure is in deeper shadow than the other, yet the whole face shows a near consistent lighting...this reads a bit off to me.