Made possible to select "next" and "previous" items on the Menu
Generalized the Menu's color and highlight color
Now the menu item's selection wraps up

Added "first()" and "last()" methods to the Menu selection.
Menu items can actually get selected now

By pressing "Enter" you can react according to the current Menu item
Made easier to read on the menu items

Created tiny local enum so we can easily add new items to the main menu