

While using the terminals or watching some "cutscenes" the system mouse would appear on the screen.
DSE previews are just corrupted color bars. Sometimes surfaces become see-through. Even though the game uses graphical corruption as an aesthetic choice, I'm pretty sure that isn't intended.

the lobby area seemed to have some significant framerate drops. the rest of the areas were fine.
a great game that plays well OOTB, however it has the aformentioned performance issue in the lobby area. no idea if this problem is specific to the Proton version i used or is it a general issue affecting most users. it is not that significant of a problem, though, since the lobby is mainly used to interact with a terminal and the bulk of the gameplay is spent outside that lobby.

Maybe it doesn't run as well as it should but it's playable. Keep in mind I've tested only the DEMO
The game has quite a bit of lag. It's also hard to say (given its aesthetics) but some assets get more blurry once you get closer to them, it seems like it should be the other way around