That’s what you get when you define font sizes relative to the viewport size.
I’d say “disable JavaScript” since this one is JavaScript-induced rather than just `font-size: 5vw` or similar, but the body element has `style="visibility: hidden"` which is removed by JavaScript, so you’ll get a blank page for your trouble. And the squiggle and other images use <img data-src> which is turned into <img src> by JavaScript.
I still haven’t decided which I hate more, pure-JS pages that should have been plain HTML, or pages that are gratuitously hidden in CSS and then unhidden in JavaScript… so long as you run it.