This game is pretty good. Although it takes a bit to get to the main part of the game, the platforming can be pretty fun. The game definitely nails it with the appearance and tone, though. The spritework and art look great, and greatly help the game hit the horror tone it wants to. The final boss especially looks really cool. However, there are multiple problems I had with the game that held back the experience.
The fires aren't very fun to deal with. Their small and gray appearance makes it hard to see them in most cases (especially early on when they're placed in front of bones), and due to the lack of invincibility frames, they can often hit you multiple times, taking out large chunks of hp.
The final boss can feel really unfair at points due to the attacks. While the ghosts and symbols attacks are fine, the homing balls feel nearly unavoidable due to how long they last and how the character moves. I think it would be better if the balls didn't home, but instead shot towards where they player is without turning, possibly with a higher speed to compensate.
Despite this, though, the game was still pretty cool. However, you should probably change the rating from E to T or M, due to the game's horror aspects and use of blood.