Not really: both Google's internal VS Code based IDE and Colab have various background pets as an option: [1]. I am pretty sure the developer saw them.
I hadn’t seen those prior to making it. From memory, the example vs code extension is a typing cat so I just evolved that. I had used the old Windows desktop animals from the 90’s.
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.