Sometimes players remove their hand too early when selecting Trials answer

[rhoslynroebuck]

During the Trials, when players hold their hand inside a buckyball to select it they sometimes remove their hand slightly too early. This means that they have to start the selection process again.

It might be nice to have some other way of indicating that the selection is done, e.g. a small vibration on the controller or noise.

Connected with this issue #376

[luistoledo]

I imagine two ways to fix it:

1. change the selection interaction process
   1.1) like pushing a normal floating button instead of moving a hand inside the molecule; the risk is that the user may press it accidentally when exiting the previous molecule-interaction phase

2. be clear on the time needed to confirm the selection.
   2.1) when user puts their hand inside a molecule: we can display a 2D circle on top of the hand, and start filling along the confirmation timer (similar to how the timer works)
   *this is my favorite one

[rhoslynroebuck]

Yeah the second option sounds great!