This is a really cool idea! I love the circle above guards' heads to indicate their awareness of you. Although, like the others in the comments have said, the second level is very hard but it was still fun nonetheless. I also wanted to mention that the guard on the first level managed to catch me from the other side of a wall (where the organ is kept) which I found hilarious. As for audio, I wasn't sure if it was just on my end but I checked the comments and now I understand why there is none. (It actually kind of makes it more intense not being able to hear where the guard on the first level is). Congrats on your first game!