Joystick display

[awake]

The joystick in one of the Heboris versions was a cool feature that
showed which keys were pressed. It would be a nice feautre to have in
not just games but on the menus and other screens as well.

It would greatly help navigation if we have a joystick with some text
next to each key showing what each button does. There could be arrows
for each of the directions. In the main screen and mode select, the up/
down arrows are highlighted showing that you can press these
directions to navigate. When changing options, the left/right keys can
light up but in a different colour to the up/down buttons.

Text can be displayed next to the joystick/buttons detailing what each
key does. In addition, the actual key for that button can be displayed
if the user is idle, which could be the case if they forgot what the
corresponding key was.