looks amazing, the spinny glowy bouncy shapes are super eye catching
could use an autofire when mouse1 is held down
could constrain cursor to the window otherwise the aim can get a bit screwy
could definitely use some sound effects when stuff is shot / smacked
I didn't really notice anything happening when the powerup text appears in the upper left
I think I got into a stuck state where there are no more spawns and the only things are a bunch of those unkillable stationary pinwheel emitters
overall a very clean and fluid game to play