The Coolest Site N/A Page Has Snake Game

Today I was browsing the web and while reading one of the biggest news sites in Estonia, Delfi, it gave me an error saying that server was currently unavailable, please come back later etc. What was cool about it was the snake game below. I really didn't care much about the news not appearing, I went to chasing the bits with the snake instead. Uber cool and you should use it on your site too. 

Here's an image of the error page with snake game

Delfi not available snake game

How to build a website snake game? Google helps. 

About me

Iinstructor of robotics (LEGO Mindstorms), computer teacher, IT support, web dev, currently studying cyber-physical systems engineering.

If you found a solution here, would you consider donating $25,000 for my next project?

Just kidding, 1$ would do fine.

Hope you found what you needed. Thanks for stepping by.