Hey people,
just a curios and funny thing... probably you've already heard about 'cardboard' and 'virtual reality (VR)' - the case where you put your smartphone in and you can look around by moving your head. Well, I tried this out with OA and on first start it worked fine for me. Then Idk why, I saw not only OA-window but also the whole desktop (WIN10). I was/am too busy to figure out a solution for it. But if you want to give it a try, then you'll need e.g.
Intugame VR for your desktop and phone (and WLAN or USB cable, installation is very easy). Then disable fullscreen in OA to let it work. Now you can aim by moving your head! In the settings of Intugame (right click on green dot) you can set the senitivity.
Enjoy!
p.s. let me know if you got success with it