It seems that little thought went into the anatomy of the characters. They are literally stick figures. Not even stick figures with any artistic merit.
The story isn't funny. There isn't any sort of build-up or punchline. It's just sort of a "Something happened. Character dies for some reason" scenario.
You would benefit from finding books and tutorials on drawing people. Stick figures do not get your message across and make it hard to take your art seriously in any capacity.
You may also want to search for the work of famous comedians. You may get ideas for better material.