A Game. You’ll find it at http://cb2.dev0.cloud. It’s fun. You can save the game locally via cookies or take it anywhere via text-snippets, which you can memorise and type in at another computer to continue your game.
Attention! You must enable cookies and you must not delete them every time the browser closes, otherwise you will have no savegame!
You can load a local save by using the following links:
The Website from the author is here.
The Game on Github is here.
The Wiki for that game is here.
And here are two screenshots: