Added hiding the mouse cursor while active phase of the game is in progress. This change is applied only to platform builds (Windows, Mac, Linux).

Sadly, the change is not compatible with Web build at the moment (and Web build works as before – the mouse cursor is visible all the time). I’m using the latest released version of the Raylib (5.5) which has this issue – https://github.com/raysan5/raylib/issues/4940 – it is fixed already, but not released.

P.S.: If I figure out how to use Raylib with the latest changes (fixes), I will update the Web build.