This is a piece that instantly stole my eyes. I love how the perspective is portrayed and the style you used to complete in impact of the scene. Very well done!!
There are some areas like near the man and the dog, there is blog of white that could be narrowed down. The same goes with the mid section below the open space. It sorta intertwines with the wall and gives less of a "in-depth" area. It is also possible that the line that also goes across the screen is seems a bit "annoying" to me eyes. Otherwise, this is an awesome drawing you have provided!!
Keep it up~