I really loved the atmosphere in this game! The timer and sanity/health system added a lot of tension. I also liked the different endings and your use of text animations. You already mentioned adding music, but I also think adding sound effects, like a door creaking or clothes rustling, would add a lot to the overall atmosphere (and it might even be more effective without music). I think the pacing is good; the gameplay loop is very quick and easy to redo if you make any mistakes. The choices are also easy to understand.