Got it. I've tested it on Ubuntu 18 before releasing it and it seemed to have been working. Super sorry about this, but I'm afraid I can't really debug it right now because I don't have the relevant ubuntu machine available.
Hey! I've tried to solve the issue and uploaded the new DRM-free Linux build. Can anyone see if this works? Sorry again and thanks for letting me know.
Are you using itch.io launcher? I've replaced the archive and it seems to be different now and does not auto-update for people, can you try deleting and re-downloading the game?
