Game somehow gave a cool feeling, but was a bit annoyed that the bullets weren't hurting the enemy, apparently you have to be really close, also the controls were a bit weird. In games like these, if you have different controls and mechanics I would suggest a small tutorial to start of the game. Lot of people don't read up on instructions too much, they are used to having certain buttons do certain things.
Overall good art and cool idea, but polish it a bit, and it feels more complete! :)