To start off, I think the art is nice, especially the planets. The basic layout of controls are well thought out and the instructions for the game are nice and clear…
Holy moly, though, those controls! As far as the mechanics, everything works exactly as you describe, from what I can see, but the controls… I think there are two things that make this game near impossible for me. The first is how little energy you get from clicking the energy button. The second is how many shots it takes to destroy a single Fox or asteroid. Combine these issues and the game was near on impossible for me. Then you have two or more “bad guys” on the screen…
In general, I think this game has something to it, but I think the mechanics, as they stand, just make the game near impossible.
One thought I had was maybe if the ship buttons were mapped to the keyboard and the turret controls to the mouse the game may have been far easier to handle.
Like I said, estheticly this game looks really good and I can see a nice game in there, but, for me at least, the control scheme when traveling makes the game mostly unplayable.