Hi! Thanks for the feedback!
You can change the mouse sensitivity in the menu. Did you try that? The "skipping" effect might be because of bad optimization. My scene has a ton of real time lights and they are active all the time (something I will definitely pay attention next time).
Can you explain a bit more about this soft lock? What exactly happens? Can you reproduce it? (I will try to meddle with the first puzzle, but only on Wednesday).
Yes, the walking sound not turning off is a known issue. First, because I was close to the deadline (game was made for a jam), later because of laziness :(
I am happy that you liked the atmosphere :) Thanks for playing the game!