Very Nice
Very thick outlines of both the figures and their "SURROUNDINGS" add a uniqueness to the art style, providing a bold appearance, That amplifies the "EXISTING-ASPECTS" that already hold the "VIEWERS-ATTENTION" an example being the replacement of human heads with disfigured animal skeleton heads, Mixing that with the innocence of children and the sweet practice of trick-or-treating, plays interestingly to Halloween and what is represents The dull color scheme essentially preserves this eeriness too.
~~THINGS TO IMPROVE ON~~
So some added lighted effects like the windows and the moonlight could be light up more.
~X~