It requires a headset and browser with hand tracking support (e.g Meta browser on Meta headsets). Starting point for hand attached menus. Only 400 lines of code.

With your right hand hover over your left palm or wrist and pinch to open the menu and release to close or select an option. A wrist menu more familiar but often one hand to occludes the other resulting in tracking loss. A palm menu is less intuitive but more robust against occlusion.

Grid shader by onirenaud
Starry Night shader by sneha-belkhale
Watch model by Socksthecat