I'm really impressed that you managed to put this together so quickly! I haven't played all of the Spooktober games yet, but this is definitely my favorite so far and I don't think that's gonna change!
I loved the foreshadowing. It wasn't too obvious but enough for it not come out of nowhere and add a little uneasiness. I liked the subtle horror in the first endings I got too (the two friendly ones.) It made me excited to unlock all of the others and find out more about them.
If you made any more horror games I'd definitely be interested!