Really nice entry! It took a while to figure out how the game worked, but once I did it was really fun (I played through multiple times) and felt great figuring out the best strategy. My only complaint is that the detection was too sensitive, or maybe a bit buggy? There were times when I wasn't sure why I had been spotted, i.e. was in another room and had not left any ectoplasm behind. Also there was one playthrough where I somehow managed to glitch into a wall :D
Overall a really impressive game for 72 hours!