Sound - no music sadly, SFX was repetitive, I wish there were some good old Star Trek inspired pew pew sounds. That would really add a lot to the vibe!
I could not find the jumpgate, is it my skill issue? I tried 3 times, I went out of bounds 3 times.
Adding a waypoint to the gate would definitely help.
I liked that I could shoot by holding the button, I'm really thankful for that!
It has a very arcade feel. However it lacks a lot of polish, still it's impressive that you did that alone in sauch a short time and had an original idea.
Good luck!