I had some difficulty to understand where I was supposed to be on the map at the beginning. An indication of some sort would have been nice.
I'm not usually playing this kind of game so I don't know if it's a common mechanic, but I don't like the fact that I cannot open a door or use a trapdoor without being seen immediately if there is someone looking in my direction.
I liked that the guards have reactions when using some items, it adds more complexity and immersion to the game.
Pretty complete and complex game overall, good job!