I have no idea what this has to do with Touhou besides the shmup gameplay and what it has to do with the theme except for the title.
The opening is probably the best part about the game, aside from the music that is pretty nice (despite the fact it doesn't scream touhou in any way).
The gameplay is kinda lacking. Enemies are more of an annoyance than a threat and thus the shield feels pretty useless. At like Level 3 dodging becomes basically impossible because your hitbox is so big and there are about three million projectiles.
Enemies sponge way too much damage and it all just really drags on and on.
Overall, it's so-so. It works, it does what it sets out to do, but it lacks any connection to the theme, which is sad.