"What is love? A pure concept miserably lost! But enough talk, have at you, sinners who've forgotten true love!"
This is what I understood from the banter. I didn't quite get what was the story (well, since it's only stage 6...) but the fight is really well made, not at all unlike an official Touhou boss.
I'd have loved to see a complete 6-stage game of this, the original character feels well built, and I'm also curious about what incident happened, and why it happened.
What I do think needs a bit of polish are the player shots and bombs. I can't really pinpoint what I think looks off though... And the sprite of the two protagonists side by side? That's cute but it also somewhat troubles me when I'm focusing on dodging the bullets incoming. When using peripheral vision to look at the bullets and still have the character sprites be on the corner of the area I'm looking at, I have sometimes trouble telling where is the hitbox. I know it's between the two girls but my Touhou instincts tell me it's "in the middle of the character" which thankfully hasn't led me into too many accidents of "I thought my hitbox was there".
Everything else is really good. The visuals and the music would have deceived me in believing it's a true Touhou cardinal entry!
By the way, I'm not skilled when it comes to mythology. I've caught on that the OC is "a greek godess", but I couldn't pinpoint who she's based on. Maybe Hera, the godess of marriage?