I think my initial idea to have the character choosing doors acting as a menu wasn't very handy for a more advanced menu with keyboard and game controller settings so I started a real menu.

To make everything easier to test and play I added an in-game menu. With the "Start" button on your controller or with the "ESC" key on your keyboard, you can fire up the menu even in the middle of the game which acts then as pause the game functionality which is pretty handy. The plan is to have a more advanced settings sub menu.