Hey I really liked this! I think the basic idea is great, the characters are fun and it's nicely written with a really distinctive voice and clear prose.
As others have said, I think some layout work would really make this sing! The art you have at the end is KILLER and fits the tone of the adventure so well - but it feels really disconnected just having it all at the end. I finished reading the module, saw the art and thought "woah, okay, hang on" and went back and read it again with a new appreciation for what you're doing here.