Because they are hosted on GitHub Pages , these sites bypass most network blocks, making them highly reliable for "unblocked" gaming.

The .io game phenomenon completely transformed casual web gaming. What started with simple, multiplayer browser games like Agar.io and Slither.io has evolved into a massive ecosystem of real-time, competitive, and highly accessible experiences. Today, a significant portion of this evolution is happening quietly on GitHub.

It's an ideal starting point to understand the core principles of IO game design. Check out the code at: github.com/jespertheend/splix .