The game is Stray. Developed by Blue Twelve. Published by Annapurna Interactive.
https://en.wikipedia.org/wiki/Stray_(video_game)
Without spoiling anything, there’s way more to this than just a cat simulator. Loving it so far, in any case. I recommend this to anyone who loves exploring new worlds, interacting with lots of locals, solving puzzles. Everything about it has both a familiar RPG feel and also a sense of new to it. And it plays really well on Linux via Steam.
It’s a fantastic little adventure platformer, wrapped up with cat physics. Some of the missions you end up doing don’t seem catlike at all, but I forgive them – most cats wouldn’t properly move a plot along without the prompting of their robot friend either. ;)
It’s a very nice game, and at a good price point. :)