The vibes are immaculate, but I do have some not great opinions about the gameplay itself.
It's slow and drawn out even compared to older shooters of the PC-98 / Commodore era, it gets a bit hard to tell enemies from bullets from my poor eye visibility and the boss designs look nice, but the patterns feel pretty uninspired.
Maybe I'm not the intended audience for this game, but as a fan of the genre I wouldn't call it a bullet hell. At least it wasn't a survivor-type game labeled as one.