Great game! I think it has an extraordinary visual style and an immediately engaging sci-fi world. So many questions come to my head, even after the first few seconds, which is always a good thing with sci-fi. The trickle of story throughout is also really well-done.
I think the main mechanic fits the theme of the game well, and the way it's implemented is very slick. One thing that bothered me however, was how easy it was to accidentally get turned around and end up visiting the same towers more than once. If that's the feel you're going for, I'd say it feels like the game should acknowledge that you got lost by having the robot say something about it. ("Here again? I can't believe I keep visiting the same tower" or something like that). But it feels like that feeling of being lost isn't really what you're going for. More the feeling of searching for, and discovering, new areas. And if that's the case, I'd recommend adding something to mark visually where you've already visited. Maybe changing the color of lights you've walked past?
Again though, excellent game. I was really affected by the ending too. Wasn't ready for something so existential!
I actually recorded my playthrough. If you want to see my impressions as I played, you can see it below (timestamp for your game in the description). Hope that can be useful!