Great game, with little need of improvement
This is a very fun, unique game that could keep me occupied for hours on end. The gameplay itself is simple and pretty easy, yet not so easy that I feel like there's no challenge. However, it's the storyline that reeled me in and sets this game apart from any generic side-scrolling shooter. It has an interesting plot and a deep emphasis on character development. The character art is in a beautiful anime style, but I found some of the enemy designs to be somewhat plain while others were very unique and creative. The soundtrack was simply beautiful.
The only thing I could think of improving on is the scenery you can't fly through on the levels. In certain places, such as the city level, it's hard to distinguish the background from the parts that you can't fly through. If you make a sequel(which I REALLY hope for) perhaps make those objects stand out a bit more, and maybe be able to shoot through them.
This is a very good game and I would love to see a sequel sometime in the future. I must have MOAR!!1!