I also think devs/creators can still have this freedom for their design (within reason)
I saw someone hiding the info box...
It should be about content design, not page design. One can of course do design with css, it is a very powerful tool. But in the end, css is meant to format the content, not be the content. So I always kinda wondered, what exactly people want to use "custom css" for. What can they not achieve with the given tools that would not also be tinkering with the ui? That is actually a serious question. I am not versed in web design. So I would not know what limitations there are for crafting a page on Itch. I would not recognise what is missing.
And what would developers do, when they realease the same game on Steam... If their design is in the css, they are out of luck.
If you have full control over a page, a css rotation is surely the more elegant solution to collapse content and still show it somehow. The poor man's version would be an animation I guess.
(Btw, I mistook your pitch web app with the css itself. I randomly opened your projects trying to see if somethign was jumping into my eyes. And then I did not notice the autoplay on the web app. But the example I picked actually was css.)
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For the user tools I inject
.user_tools { position: static; }
on client side. For reasons I do not quite understand, this pushes it above all else, so it does not overlay with a browser game or other stuff. It is not the best ui element for some pages. When the standard css pushes the tools above the page and flattens them, that might be better. But when this happens, the screenshots scroll sideways in a box and are above the text too. I like the screens to be side by side with text while reading the text.