I'm slightly confused as to how Angelica and Gabriella relate; is Gabriella the subject of a book Angelica was reading? I was expecting this to be in the intro to the game but no explanation was given. Maybe it's later in the game, I didn't get that far.
I died at the first (tutorial?) boss. Unfortunately I can't play bullet hells to save my life.
I did notice some possible glitches. Sometimes I couldn't aim while in the air and sometimes it did seem to work, not sure what's going there. Some hits also seemed to pass through me.
Nonetheless in general this seems to be a really nice and polished entry. The art is fantastic, the music and sound works great with it, movement is responsive and mechanics seem to be well polished.