I think you had a lot of cool systems in there - the radar was nice and some of the HUD targeting looked cool, the little trails off enemy ships were neat to see in the distance too. The controls were a bit annoying to wrestle with, but I've only really made 2D games so I can't offer much advice on how to fix them, I just know they're probably a real challenge to get right especially given the time frame.
I think the only other thing I'd comment on would be the sound - sourcing some better recorded sounds and maybe practicing layering them in a free DAW like Reaper or even audacity would help a lot for future projects. The as3sfxr sounds were a little wimpy and didnt suit the gameplay too well. Check out channels like Akash Thakkar's for some tips.
That's all I have to say I think, it was a pretty solid entry otherwise, thanks for making it :)