I wanna give some feedback:
Maybe this is stupid to say, but even though everything is black and white and it would break the colorscheme, it would be great to make the cursor a different color because I lost it a lot of times because so much was on the screen.
I personally didnt like the insta-death too, but thats totally up to how you want your game to be.
Aside from that i loved how good the controls were and it was really fun to destroy the enemys!!
Liked your game a lot and rated it! :)