Really well done, I like the mechanic. Simple and fun! At first I didn't realize you were only supposed to target the demon eyes and was zapping angels left and right, but I eventually made it to wave 10 with over 16k points. Good ramp up of speed and I also liked that you could get 2-3 with one shot if they were clustered close enough. I do think at some points they get a little too close to the top of the screen though. I wish there was some fun background music to go along with it, even something simple would add a lot of life to it.