Yardball seems to be just a silly made-up game created by the main character's younger sister, until it becomes the only way he can force Death into giving him a second chance at life.
Did You Know?
Kid, you've got to lighten up and have a sense of humor! You know you haven't smiled once since you died? I mean, I brought you out here to cheer you up!
[camera zooms out to reveal they are leaning against a child's playground
You are such a dick, and you are the worst person for this job.