Good idea, honestly it just needs a lot more polish and better presentation.  There isn't really visual feedback on how much health you have left or when you're going to die.  Maybe a bit could be added to the gameplay as well.

Art for character is cool. I had trouble being able to see what my controls were and how I was supposed to move/shoot.

Like the art style! - Bit hard to pick up - enemy respawn would be nice though.

Cool concept, you could make it so enemies respawn when you kill them, and for every kill you get score, because you can kill all enemies in just few seconds, unless i missed something