Just bought the game - thanks a lot for the DRM-free release!
Trying out the game - it runs well (AMD Vega 56, latest Mesa master, using -vulkan option). Not sure how to create some framerate counter HUD, radv doesn't have an analog of GALLIUM_HUD yet. Adding -fps parameter to the binary didn't help (UE4 documentation suggests it should show the counter).
I experienced one game hang so far (it didn't hang the whole OS but the game froze with stuttering sound), after traveling to another sector (Miner's Home) in the tutorial.
Also, the package on itch is missing game icon, which can be found here. You can just bundle it inside, it's useful for making the .desktop launcher.