I never really gotten into space sims, but this one is quite good! I really get the feeling of beeing up against a massive horde of foes.
Let's see ... head-movement is used to rotate you in any direction (roll, yaw and pitch). The left controller moves you forward/backward/left/right. Finally, the right controller moves you up/down. It kind of works, I think. At least, head movement is way more reliable than xbox controllers.
The left trigger should slow the turning and there should be a combo-meter too. I didn't notice any of this.
I have to almost touch my shoulder with my head to do a roll. Likewise with pitch and yaw. Maybe finetune the turning so they requires less extreme head positions?
The 3D crosshair is a cool design idea but it's really distracting. I rather be without.
It would be cool if the ship slowly broke apart when you got damaged. Some cockpit details would be good too. I can do you some 2D graphic, if needed. My address: kasperhviid (at) gmail.com