Extremely good job with the art, it is so crisp and clear, really easy to read.
It really is a shame that there is no sound, it would've made the game so much better.
Also as some have said, the camera-knockback when you shoot feels a bit strange, you are shooting in one direction and the camera knocks itself back in the other direction.
Other than those things it's a really good game, would love to play an updated version of this with sound effects added.
Great job!
Let me know if you upload a new version!