Outer Wilds still stands as my favorite game of all time, and this is an excellent tribute to it!
My biggest "issue" is that I'm not sure if there was a hint to the location of the "Hidden Temple" (mentioned early enough that I don't think it's a significant spoiler to say that it exists), but I ended up stumbling into it pretty quick just wandering around the map and noticing some geometry at night.
Also, it would be nice if time froze while reading as it does in Outer Wilds - definitely had a few times where I got pushed off of a message I was halfway done translating :P
Otherwise, the rest of everything was very neatly foreshadowed and I loved the little character details and relationships scattered in the messages around the world - definitely adds to the life of the world similar to the game that inspired yours! Excellent work all around, had a lot of fun solving the world puzzles here, and definitely got the vibes of my favorite game, all in one bite-sized experience. Great stuff!