For CSS-only slider with no input elements, one option is automatic carousel/slider. I’ve made a pen for it, designed for itch.io page, you can test it out in your page directly:
https://codepen.io/nnda/pen/KwPGgXX
Though, as the name suggest, the image will slides automatically without any user interactions.
There might be a workaround to achieve clickable/interactable elements with :target CSS selector, and the <a> tag with name attribute. As demonstrated by this project: https://npckc.itch.io/content-warning-generator