So, I would like to have a copy of this in maybe a .cbr or .pdf or whatever, but for it to also keep a little bit of its essence, like the background and also sometimes it has like parallel dimensions so right after one part it goes to another dimension so its hard to download, would it make more sense to save it as a website or what?
you might try using wget’s recursive mode to download
wget \ --page-requisites \ --convert-links \ --wait=1 \ --waitretry=1 \ --recursive \ --level=inf \ https://www.unicornjelly.com/