So, I didn't play the game all the way through the end. I got to the part where you are supposed to be fixing the TVs, but didn't have time to play further unfortunately.
It is an interesting concept. I made a very similar game to this one as my first horror game ever. It's called Amarok's Howl and it's on my profile page. Feel free to check it out. It's not really great and probably not even good, but it could give you some inspiration if you want to try out this concept again sometimes in the future.
One problem is the lack of visibility. It appears to be the main reason for difficulty for the first levels before you get into the brightly lit building. A flashlight doesn't illuminate literally just the narrow bright beam, it should also make the surrounding area a bit brighter. And some kind of handheld electric lantern that illuminates the area in a circle around you would probably work better in a game like this. The way the game is now, it's more frustrating to play than fun.
Regarding the gameplay... I'm not a fan of the duplicates and triplicates of the ghosts. It would be more thematic to just have the at most just the three 'zombie ghosts' that represent the MC's dead family members and just have those be more 'aggressive' and smarter. There's a way to use RPG Maker's default Pathfinding through a script call and there's also some detection plugin for MV that you could've used.
The way the game is now, it's more like a zombie apocalypse game than the way you envisioned it. You could just replace the repairs with searching for supplies in the buildings and nothing else would really need to change to fully turn it into one.
The game also uses 1-tile high walls for indoor maps a lot, even the RTP sample maps use 2-tile high walls, so the 1 tile walls with the tall POP Horror sprites look extra tiny in comparison. Also, you seem to have used the wrong floor tile in the school area that has those shadow lines instead of the proper one. I appreciate the custom tiles for graves and the school desks though.
Ultimately, I feel like the concept was interesting, but could be much better in practice. You did really nail the theme though!