I really like this. The caricature-like aspect to the characters and the panel layouts (especially the last page, with six tall panels) remind me of Alex Robinson's work. And this might just be me, but I actually think the straight B&W pages work better without any gray. The shading on the people is fine, but the gray walls and background feels a little overbearing. I've got to give some props out to your clear composition, It's very clear where and when everyone is.