o +32767.  On physical gamepads and XBox controllers,
   the axis inputs are used to report the positions of movable controls
   like joysticks, sliders, and throttles.  In a virtual pinball environment,
   we re-purpose the axis controls for the analog pin cab inputs: accelerometer
   input for nudging, and the position of the plunger (ball shooter).
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   The gamepad provides six axes: X, Y, Z, RX, RY, RZ.  The traditional way to
   map these axes in a pin cab is to map X/Y to the accelerometer and 