Comment by mkl

Not original. Things like this go back at least to the 1980s.

Some I ran ~30 years ago:

Neko: https://en.wikipedia.org/wiki/Neko_(software)

Sheep: https://adrianotiger.github.io/desktopPet/

There were even things like this for text mode DOS. I had one that was smiley faces moving around eating letters.