Not sure what is causing this. It is a lot worse than the picture shows, with the buttons fizzlefading into the background and a lot of the UI not being visible most of the time.

Rest of the game looks great! I look forward to playing it more.

ooph! First I've seen of this. Look's nasty.

Have you tried fiddling with resolution settings in options?

Yep, i tried Fullscreen and no, as well as setting the resolution manually. The game also offered me some odd screen resolutions by default. Interesting that the screenshot has no artifacts, but it is almost unreadable while playing.

I'm seeing the same flickering artifacts here too on debian w/ nvidia.  Have not had any issues with other unity games.

I have it too, under Ubuntu 16.04. I cannot use fullscreen and set my screen custom to 1920x1080

I have the same issue in Ubuntu 18.04.  I cannot start a new game, the menu is unresponsive.

For me it worked to put the screen size to 1280 x 720 in the custom game settings. No glitches there.