Old sprunki mod (again)

I found an old mod. Whenever i show it on a different platform, people say it looks like black stuff is coming from the characters, or it looks off. To me it looks like any sprunki reskin. I don't understand how they're seeing this. Also, i could get a vector or brud and gray. Oddly enough itch kept saying they were "not in the game files", but they still worked fine.