I love the gameplay, it feels incredibly smooth to play (..not in browser tho, but that's probably the browser's fault). the music is great as well, very similar in vibe to the actual touhou shmups, as much as I also didn't realize alice's theme is mashed up in there lol. the art is nice, especially the attention to detail with the encounters between other characters in the background.
I do appreciate the continues, however without them I feel like the balancing would be a bit off (during some of the hectic parts it really feels like you're getting stunlocked, since you lose the head -> shooting is all messed up -> more dolls come in; I do really like the concept of sekibanki's head flying off somewhere when she's hit, but I think it'd be nice to create a bit of a buffer, like the closest few dolls running off, kinda like bullets disappearing when you're hit in touhou shmups), so as much as I enjoy the mechanics, I'm probably not gonna try for a no-continue run.
other than that - very solid, would be super cool to see this style of gameplay in a longer-form game with a bit more gradual rise in difficulty. and as a banki-banki fan, really appreciate a game about her :)