Graze Counter is a doujin SHMUP which is pretty self explanatory, the main gimmick is that you are extremely encouraged to graze enemy bullets. It charges your bullet clearing burst attack and some characters have special abilities that activate by grazing as well.
That's another thing, there are multiple playable characters to unlock, giving Graze Counter some replay value as well.
Aesthetically the game is competent too, the graphics are low res, but nice and I think the music is good, especially the main theme.
Also, Graze Counter comes with a novice difficulty setting and the normal mode has dynamic difficulty so I think anyone with working reflexes can enjoy it.