Beautiful looking game with a cool mechanic! Here are my comments:
The good:
> I liked the unique mechanic. :)
> I like the fact that you can have a "charged shot" when you turn longer. Right now it doesn't make much difference though, if you continue with this game it would be nice to see situations that really make use of this mechanic.
> Because of the simplicity of the controls, this could really work as a mobile game! :)
Possible points of improvement:
> I think the camera moves way too much. It can sometimes make me dizzy (but maybe that's just me). Also, when I play in my browser I don't see my health bar. I don't know if this is a problem of my browser, though ( I am using Opera).
> Maybe if you continue working on this game you can add more game juice! (screen shake, explosion) to make it more satisfying to blast enemies.
Overall, good game! Thanks for this.
P.S. I also invite you to try our game and give feedback! We are in need of more ratings :)