Look for repositories updated within the last year. High-quality games are actively maintained. Check the package.json or the README file for a live demo link. Most authors host a "Play Now" button directly on their github.io page.
In the eternal struggle between students, office workers, and restrictive network firewalls, there is one digital sanctuary that has remained a bastion of freedom: . While most mainstream gaming portals are blocked by school or corporate Wi-Fi (think Coolmath Games, Miniclip, or Newgrounds), GitHub flies under the radar. It is a legitimate, professional development platform. Github Games Unblocked High Quality