Awesome style (with so many lovy unnecessary little details!), and a great variety of bosses (not the first 3 though) with incredible telegraphy of attacks! A truely wholesome game of skill.
You've absolutely nailed the 100% accurate spin-the-bottle simulation.
I can nitpick into a weak use of the theme or not having a deep progression in bullet-hell-rogue-like-slasher mechanics, but who needs all of that if such a charming game gives an engaging experience?