Great use of both themes! Difficult game with a somber atmosphere matching the slowly chasing nightmare. I love the art choices and execution of both graphics, visual direction and the music.
Gameplay wise, its very fun, and definitely had me going through many times trying to do better, but I think the finicky nature of the second stage monsters I find too difficult.
There were small funny things I assume were bugs, like projectiles changing directions if your character turns, and that you can shoot while jumping but not while holding A or D. This is most likely at least partially intentional, but wasn't clear until I explored when I could shoot and when I could not. Very good job to everyone involved!