The HUD seems to move too much when flying in jetpack, that my camera even clips through to the outside of the glass when accelerating backwards. I can also easily see the edge of the bottom panel when in jetpack mode.

I suggest adding a command that would let the user specify the intensity by which the HUD moves, or perhaps the maximum distance it travels to. There could also be another command for specifying the angular centering rate for making the HUD movement faster when the player looks around himself.

Also, when running over staircases or other obstacles, or when going into sprint or slow movement, the HUD just moves instantly which doesn't feel much immersive. Could such instant movements be ignored by the HUD to make the experience much smoother?