CSS Speedrun
Write CSS selectors against the clock to match marked elements
CSS Speedrun is a race through CSS selector puzzles. Each puzzle shows some HTML with arrows next to certain elements. You type one CSS selector that matches all the marked elements, then press Enter. The timer starts once you solve the first puzzle, so you play against the clock.
Free · No login · Browser · Intermediate
About CSS Speedrun
It trains you to read HTML structure and choose precise selectors. Each puzzle has two hints if you get stuck. It suits developers who already write CSS and want to sharpen their selector skills.
The game is free, runs in the browser and is open source on GitHub, where you can add your own puzzles. It was made by wweb.dev.
On Breakpoint since 23 Oct 2026.