This is a very nice, well made game. The art looks good and it plays very well, at least it seems to play well to me.
I suck at bullet hells and though most of the gameplay was okay the boss battles did start to strain my eyes, so I did not finish the game.
I think the only thing I was on the fence about was the dialogue, which sometimes lacked context and was hard to follow. I also wish there was dialogue skip, especially when I had to repeat dialogue after dying.
I didn't understand what energy was for but I just assumed it was a common genre thing I wasn't aware of (I don't really play this kind of game much).
There are also a few minor glitches- high score is listed as NaN and enemies don't have hitboxes for a brief moment after they spawn (though this might not be a glitch?).
Finally, I think I recognize the death scream