The game is quite good. It's scary and horrifying, but not horrifying enough. I can tell you implement some horror elements in there, such as the flickering lights, the sound effects, the monsters, and jumpscares. The jumpscares... isn't as scary as what I thought. I was hoping it would be as scary as when you were making the Carving Pumpkin game you made, but this is quite different.
The music is alright, although I feel like it's in a major scale. Maybe a diminished or a minor scale would be better to give out a better atmosphere. And for the theme, it's kinda odd. It's not voxel enough, but rather rectangle-ish.
However, I think you did a great job of the game. Since this is your second game, good job on submitting the game in 20 seconds before the deadline. Looking forward for whatever games you'll make in the future.