Man, when it's finally daytime the enemies' number is absurd.
Fun and hardcore game anyways; difficulty rises as daytime is being reached and finally being gone through.
I think it would be more easy if the enemies also drop some blood pickups (considering the aforementioned).
As much as I like the gameplay mechanics, i.e., the attacks are predetermined and it is up to the player how they'll manage with it and how they'll collect the blood pickups, I don't find it manageable during the daytime as there's just a lot of enemies in the whole area compared to the spaces the player can move to. In addition, some of the blood pickups are spawned on the walls, so the player have no any means to collect them.
Still, both of the theme and limitations are thoroughly applied and presented in the game.