I really like the concept. The core gameplay loop is very engaging, and the atmosphere works really well. The demon design is also very creepy.
The main issue for me was the controls, which could use some improvement. The sensitivity felt far too low, entering and leaving the toilet felt a bit off, and there were a couple of times where I got stuck on objects.
Honestly, if you refined the controls and added a bit more polish, I could see this becoming a very solid indie horror game. Great work!