Really nice game. I wish I could finish it, but I got stuck in the library. The yellow key didn't work on the doors.
To get the green key I had to clip out of the map after restarting the game, and to get out of the space between the fallen bookshelves where you find the map to the green key I had glitch out by jumping at a wall then jumping backwards, which propelled me higher.
Then I spammed the door with the yellow key and lost my right arm lol.