Hi again. I have bad news for the Linux version, I can't make Steam to launch an .appimage correctly, so I'm deleting that version here. At least I know that the Windows one works fine in SteamDeck, so I suppose that with Wine or Proton, this version can still be played under a Linux environment.
Really Sorry!
But if you are still interested, I have published the Linux AppImage at itch.io
Thanks and see you!