The itch.io page is here: https://ribboncable.itch.io/neko-for-playdate
Neko is a long running desktop pet application that began sometime in the late 1980s.
It's been ported by the community to Mac, Windows, Linux, Arduino, Android, and many more!
This version attempts to mimic Neko98, specifically. As that's one that I grew up with.
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A deeper dive into the history can be found here: