The character portraits were gorgeous and I think the 2.5D graphics conveyed the oppressive atmosphere of the castle/school really well. However, it was very hard to spot interactable things such as doors on the "near" wall and often required trial and error, and on rare occasions, the screen would turn entirely black when standing too close to a wall. While such a limited field of view can help the horror feel, I think at least placing things on the wall that the player can't see should be avoided in this kind of game. The one-shotting enemies got a bit frustrating after a while, and the first bunch of enemies had me very confused at first because they looked just like the NPC that offers a save point. Also, some rooms seemed to cause heavy lag for no obvious reason.
The story actually had me very intrigued and I'd love to see more, but sadly I haven't been able to progress past saving the first friend. I grabbed the feather in the library (which seems to respawn every time you enter the room), and found two sets of jump spots, one of which seemed like a mere shortcut, and the other led to what seemed like a door but that couldn't be interacted with. At this point I'd gladly take some hints or even an official playthrough video, because I'd really like to see what happens next!