Flappy Bird Made with HTML and CSS, No JavaScript
CSS-only Flappy Bird is a fun five-minute novelty with no practical use beyond the demo itself.

AI-generated CSS when Stylus and Tampermonkey already do this manually.
Power users who customize their browsing experience
Stylus · Tampermonkey · User CSS
use opus 4.8 to create css and js snipptes to style the websites you visit the way you want. make nytimes more print-like, hn more matrix, or just replace any mention of AI with the :poop-emoji" -- your call.
CSS-only Flappy Bird is a fun five-minute novelty with no practical use beyond the demo itself.
API interception beats fragile DOM selectors, but browser agents are crowded.
Single-file UI language for AI generation, but no evidence it reduces tokens vs normal dev flow.
Forces you to disable JavaScript to enter a directory of JavaScript-free websites.
Privacy-first analytics with one-click Railway/Render deploy, but Plausible and Fathom already own this space.
Quake running in pure CSS makes you ask how this is even possible.