Superb!
I'll start by the soundtrack, it remided me of Celeste in a way. Maybe because of the ghost, dunno. But it is very very pretty when it needs to be, and packs the necessary action feel when the time comes. I just felt some of the attacks lacked sound effects. The objects flying around or the dark hands, they could have some sort of audio cue as to help evading.
The presentation was top notch, from the cute intro to the house, to the bullet hell. Beautiful and cohese. I liked that most of the objects were also interactable. Adds to the idea of someone going through his passed relative's belongings. The dialogues felt fitting, I just thought John's traffic jam joke was a bit out of place for his situation.
Also, pertaining dialogues, thanks for making the text complete when I press space. I get a bit anxious when reading if I feel the text is appearing too slow. Some games make the dialogue skip to the next window and that sucks.
Regarding the bullet hell, I just felt the hurtbox of John sometimes felt a bit too big for some patterns, but I didn't test it much. Also, the flying objects are WAY too fast to react, especially the piano.
Congratulations on making such a complete experience!