Thank you for your comment! We really appreciate you taking the time to leave such detailed feedback :D
I'm so glad you enjoyed the puzzles and platforming challenges! We will definitely take into account the feedback on margin of error. With more time, we'd love to make this a longer game where the difficulty of the platforming puzzles is better paced and gives players more time to practice new mechanics. The library room with the high bookshelf was meant to be a soft tutorial through level design, but based on your feedback and others', it seems like it didn't come across well! We'll definitely be revising that room to make it much clearer what the intended solution is -- or maybe adding additional rooms where the player sees the needle press a button on recall while trying to do some other task.
Thank you for the feedback on the SFX and music as well! We definitely want to take more time to polish up the sound design of the game, so that feedback is super valuable. Thank you!! :D