This was very atmospheric! I enjoyed this one a lot, although I had to brute force the final puzzle.
Music especially is very creepy
Thank you for your kind words. The light and enviroment make me remember to something like a backroom vibe, that was the main reason i chose that creepy music. Also to create a "I want to escape from this doorless room" feeling.
About the last puzzle, the answer was the shelf, which the shape drew the code :)