Lens Studio Cube Bouncer for the confused Unity developer: add a hand menu

If you have tried the final version of Cube Bouncer already, you might have noticed this hand menu. You pull up a hand, palm towards you, and this menu shows up. Now if you come from MRTK and HoloLens development, this is a very natural interaction method, and I decided to re-create it for Spectacles, if only because I had no idea how I otherwise should get an easy-to-use settings menu.