The backgrounds for the game look really nice, and the dialogue system and how rin changed her appearance every few lines was pretty cool.
Although this game seems to have been translated so i didnt really get what the story was about.
In the gameplay section, Marissa's bullets are completely opaque, and they go over Rin's bullets. If it werent for marissa somehow having the smallest hitbox in the world this game would pretty hard, unless you purposefully stop shooting while Rin is shooting. Which might actually be a cool concept for a shmup? But I don't think that was the intended effect.