Though not a user repository, BrowserQuest was a massively multiplayer demo built with WebSockets and HTML5 canvas, later open-sourced and forked into many GitHub.io single-player adaptations. It proved that GitHub Pages could handle complex game logic, albeit without the multiplayer backend.
If you're looking for more than just a single link, use these methods to discover hidden gems: A curated list of awesome JavaScript Games - GitHub games on githubio link
Since GitHub isn't a "storefront" like Steam, finding games requires a bit of digging: Search Aggregators: Websites like often link to GitHub.io mirrors. GitHub Search: Use the GitHub search bar with terms like topic:game language:html Community Lists: Though not a user repository, BrowserQuest was a
Several open-source JavaScript versions of Pac-Man allow you to play the dot-munching classic for free. 2. Retro and Sports GitHub Search: Use the GitHub search bar with
After a minute, your game will be live at: https://[your-username].github.io/mygame/