Great game! I agree with others, you should continue working on this and release it!
I'm unsure if it was my monitor, but I had trouble seeing the enemies. That was my only real frustration with it. It's otherwise very responsive and the reload time is incredibly generous, but not in a way that makes it feel too easy.
Future iterations could possibly include random powerups that change the way you use the light, and of course different styles of enemy.
Great work!