This is an objectively horrible movie that I thoroughly enjoyed. I don't know anything about Gumby, and this movie expects you to know every magical(?) power(??) these clay freaks are capable of. Gumby could turn into a tesseract with your grandma's face inside of it, and the movie will still look at you and go "lol you don't know about the grandma tesseract? really???"
Absolutely hilarious.