Talos
A quiet hex-board puzzle. Enclose the white stone before it escapes.
...Nothing is timed. No ads, no accounts, no engagement tricks.
The whole game is a single HTML file plus audio, released CC0 into the public domain. It runs in any modern browser, works offline, and installs to the home screen as a web app. Play it at https://danger.academy/Talos/ or download the zip and open index.html.
Rules descend from Chat Noir (2007) and Conway's Angel Problem (1982). Original music and stone sounds by the author.