Very cool horror game! I was a fan of the first Maere, and I'm a fan of this one as well: the concept of trying to sleep while strategically scanning the area for safety while risking your sanity by doing so is very clever and nostalgic. My favorite part was definitely the sound design, not just in how it creates a creepy atmosphere, but in how it intuitively gives feedback and teaches how to play the game: hearing your heartbeat pound from seeing a ghost, turning away, eventually looking back, and having your heartbeat return to normal upon seeing it's gone is so cool and communicates how the game works incredibly well. I also liked the inclusion of a scoring system as it naturally incentivizes replays and makes the short length less of a problem. Cool stuff all-around!
While I do like it, I did still find myself a bit letdown by how easy and short it is. I was able to get an S rank without any sort of problem on my second try, and I couldn't help but wish the game had more meat to it. Would love if it was more like Five Nights at Freddys, where it slowly builds up the difficulty over the days, both in how punishing it can be and in new mechanics and obstacles to contend with. Right now I can't even see how a player could ever fail, but maybe if you introduced more ghost types that need to be handled in different ways, like having to look at them instead of away, that'd be neat. Couldn't help but want more, and I hope you can take that as a compliment, because it means you've got me hooked!