Definitely has a great visual style, and kudos for making them all in the drawing API (I agree, it must really be a pain in the a** to do that, haha - but it's definitely worth it).

The whole game seems a little too "by the book" though. It feels like I'm playing some generic arcade shooter - the visuals are really the only thing that stand out to me. I would try to implement some defining feature that sets your game apart (other than the visuals).