Wow, that intro was really atmospheric. I enjoyed it a lot, sucked me right in. The graphics are pretty incredible as well. After I fixed the tree board, nothing happened as far as I could tell. I redid it a few times hoping that there'd be some sort of "thing" (like the tree lighting up) that would let me know I'd done it successfully, but I didn't see anything. After I fixed the board that led to the metro, the screen flickering really threw me off. I thought the game had bugged until I read the other comments here and realised it was meant to do that. Tbh, I found it a little bit obnoxious, hahaha, it was really messing with my eyes.
I killed a few dudes in management but I couldn't find anything (I see in the comments that there's a board there I can repair or something?) and even the mild flickering in the other view modes was starting to give me a headache, so I ended it there.
Beautiful world you've conjured and I love the mellow atmosphere the game has going on. A really great job for a jam entry overall!