The first three health bars aren't BS because of their contents. They're BS purely because she has twice as many HP as she should. (Three times, in the case of "Colorful Trap.")
The survival cards are quite fairly unfair, though. If that makes sense at all.
The BGM choices are... interesting. Magus Night and Falling Objects in the Sky. :/
Divine Battle doesn't work, presumably due to a script not included in the download package ("item.txt').
I'm confused as to Kagamin's invulnerability. She turns transparent on bombing, but she doesn't lose her collision detection, and she seems to still take damage.