I've used Emacs for years but just recently learned about zone.el. I wonder if this is based on it too. I see some of the same screensavers here.

Wow! The copyright of zone.el goes back to 2000. But this is the first time I hear about it! How did you find this gem?

It got mentioned briefly in an article in Mickey Petersen's excellent Mastering Emacs blog.

I know the trendy thing is to hide the menu-bar, but it's great for discoverability. Tools→Games→Zone Out