Coming next I'm going to try adding a velocity-based control mode. With the existing relative movement mode to move your cursor slightly up you have to tilt your head quickly up and then back down to the centre. With velocity-based control, you just move your head up, and you never have to worry about recentering.

I experimented with this on my own head control mouse (based on a microcontroller emulating a mouse from measurements of a gyroscope attached to a pair of headphones.) and it was way easier to use than relative position from a center.

I'm pretty sure this is also how the SmartNav software does it, but I'm not certain.

cc @uglyDwarf