Sweet little arcade-shooter. Everything is well polished! The game feels satisfying to play. It would be nice to have some sort of death-explosion for the player, as the black screen comes in rather quick (however that's just a nitpick :] ). I also feel that there is not enough contrast between the enemies and the background- however, considering the monochromatic palette it would be tricky to keep the player visible! So maybe another color needs to be brought in. Great work :]