Hi INSERT, Thanks for giving it a play through!
Good to hear that 21:9 resolution works nicely :)
Rebindable controls and possibly joystick support is something I will work on in the future.
Flares will go under a major revision sometime in the future. I did go a bit overkill on the flares for the enemy (though they dont actually do much). I'll work on it further eventually.
Variety is definitely something that will be increased as I make more assets :)
Difficulty will certainly be worked on in the future.
I'm still considering the possibility of including a AoA unlimiter. I've rewritten the flying code a little bit so it may pave the way for that feature in the future. Not confirmed yet though.
The enemy selection is already visible on the radar though it is rather vague by just blinking on and off. I'll work on making it more intuitive in the future.
I'm aware of all the menu suggestions, I'll bring something like that the further I get into development.
As for your FPS limiter, I've just been informed that there's apparently a bug with the "Unlimited" option. Try setting it to "144" as that will limit your fps to the value of 144.
I also uploaded a video on some of the feedback that came in for this particular demo a few months ago :)