This seems more like a gallery of art/starting point than a "use this as-is", so I'm sad to see this comment on the top of HN since as a show of what can be accomplished with checkboxes it's amazing.

We front-end devs would benefit from a lot more works of art like this, and then people trying to implement them into real systems would need to make them accessible. Similar to how we benefit greatly from Dribbble. If we don't allow for unrestricted just artistic bits like this, then creativity suffers.

Counterargument to myself: the click to copy though makes it seem like it's ready to use, and many newer devs would just use them straight away. It's on the hands of more senior devs to tell them that these snippets, similarly to many StackOverflow ones, need to be adapted to integrate in an actual app for things like accessibility, uniformity, etc.