Shrouded Space was developed for a Game Jam and it's really impressive, and the developer just released an update to it that also includes a Native Linux version.
More about it: "After ten long years of solitary confinement on the Empress Xyra's prison planet, you have just been summoned for a special work detail. Could this finally be the opportunity you have been looking for to escape and put all this behind you?
Shrouded Space is a cosy undercover space, point & click, adventure game where you are the hero/villain of this epic journey across the galaxy."
It was actually the winner of the $107 Adventure Game Challenge.
Check it out on itch.io.