Fixed/added:
Keyboard: Cursor keys to navigate menu and launch ball. Return to select menu option. Backspace to navigate up menu levels. Space to show/hide menu. Control keys for left/right flippers.
Xbox gamepad triggers: Added flipper input to gamepad triggers.
Ball audio: Added temp ball audio.
Vive rotation: Added option to reset rotation, as well as height and position in vr menu. Currently not saved between game sessions. Will improve whole system in a future update.