I feel sad while watching this. It's just that I don't really follow the story or know the characters' names or anything. I can still love it for what it is. It's a great piece of art you've made here. Black Bart sounds like something from "The Simpsons". I guess Bart's not a common name.
It's great how you keep this tone. It's just so nice and light. Even the darker parts aren't so dreary. It's always nice to have such cute characters. I don't seem to be following all the numbered parts.