The Talos Principle First Play/Replay Discussion

With the announcement of The Talos Principle 2 coming out on November 2nd and the original game having come out in 2014 it seems like an excellent time to get the first game fresh in our minds. How are you enjoying it and if you played it back in the day, what's it like coming back nearly 9 years later?

I'm going to try to take a moderate stance on spoiler tags as I know entire threads of REDACTED aren't very enjoyable. If you have been playing for more than about 8 hours you should start tagging story. All puzzle solutions must be spoiler tagged.

I had apparently played 14 hours already but epilepsy deleted those memories so this is as good as my first time playing. I've just barely started but right away the game is very pretty. Hard to go wrong with crumbling grassy ruins. It'd be quite serene if it weren't for the occasional mine drone or auto gatling gun. So far it feels like it's aged excellently and could easily have been released yesterday. Also I get the feeling this is the kind of game that will hold a lot of secrets.