New responsive menu questions

I’d like to start using the new menu instead of the current (old) vertical menu i’ve been using so far.

But there are three show stoppers:

  1. how to have only the menu on the left of the screen and nothing at all anywhere else (no top bar or anything else)?

  2. how to make the menu change to hamburger menu when a menu item is executed?

  3. how to make expanded menu items automatically collapse when a different menu item is clicked\expanded?