Finished it yesterday. 6h. Sadly I think it's rather meh, and I actually like walking sims (finished most popular ones). It's pretty much Firewatch in space - walk around, talk through radio, read some lore. There are driving sections but they barely differ from walking.
The story is virtually a copy paste of Lem's book, down to some details (like the bitten soap). There are some choices, but most of them are about achievements, as there are just 3 effective endings, all of which seem to be an outcomes of a final dialogue/section. Gameplay wise, IMO it does a better job than recently released Scorn (and many others), as it doesn't try to "gamify" a walking sim by adding pointless stealth or pseudo shooting sections with janky mechanics.
There are some decent philosophical dialogues, but like the visual style, they are stuck in this '60s retro futurism, in which robots are effectively thoughtless automatons often stuck in their programming. From that standpoint, the whole premise and idea of nanomachines does sound futuristic, but honestly in modern day and age they mostly present archaic viewpoints.
The art style, much in vein of Alien Isolation and slightly Brethedge, presents a nice vision of Lem's future, full of gauges and knobs. Graphics technically, are decent at scale - distant mountains and rock formations do look picturesque, but at the same time, for majority of the game it's just one lengthy, rocky tunnel with outdated visuals - almost flat geometry with visibly tiled texture, and some occasional 3d rocks here and there. Speaking of textures, many objects are mapped poorly with textures stretched on entire sides. Metallic structures being the prime offenders. Most of work is just dumped on engine, up to a point where every setting can be cranked to Epic, and still look weird because the models are not up the task.
Music is decent, an ambient/electronic fitting enough to sound good, but nothing special to write about. It's no Lustmord like in Scorn.
Al in all, a decent game but I sure expected more, especially in terms of original plot and graphical technicalities.