The gameplay is what you expect of a schmup in all of the good ways. It has a lot of good variety between stages. The way that scale is used is also a lot of fun, and so it naturally helps a lot! The foes all fit in very naturally, too.
I liked the retro anime style that the art has in the game! I enjoyed all of the music as well - and appreciated the lowered volume settings by default.
Overall, this is easily one of my favorites. Well done, developers!