Nice work! Fun stealth game, definitely grabbed my attention right off the bat and made me want to play a while. Unsure if I just couldn't get the sounds on or if there weren't any - I saw you mention in another comment that this is the first game y'all have made together and I also didn't have any sound in my first one lol! But I think if you were to keep working on this, some footstep sounds or something coming from the guards would be an awesome touch!
Seriously though, waaaaay better than my first game and I had a great time with it!