Space Combat HUD Design
I'm trying to incorporate the same clean and simple look from the character and planet design into the UI. I've taken some inspiration from one of my favourite space combat games, Freespace.
The gauges reflect thruster (outer left), booster (inner left), shields (outer right), and hull integrity (inner right).
Aiming at an enemy target's lead indicator (the small X that shows where you should aim to intercept the target) will cause your reticule to change color. The center of the reticule will follow the target as well, which hopefully makes it obvious that there is some aim assist.