I can confirm the game seems to mostly work on Ubuntu with some caveats.
I've tested it on Ubuntu 23.10 on wine 9.0 (Downloaded via Wine HQ repos). It runs, though proceeding past the intro/loading a save takes long enough for "Program is not responding" window to appear. The main issue is that if you ever alt tab from the game and come back you can no longer click on anything - there's a sound effect, I can drag any opened window but can't interact with anything else.
Any chance for a native Linux build given that it's made in Unity? :)