You just wire the Up to up, down to down, right.....
You get the picture...
It only takes 4 inputs, up, down, right, left.
Diagonals are up+right, etc...
As far as daisy chaining the ground wire, just cut wires long enough to extend between each of your controls, and attach them in order...
Just move the joy in the direction you want & note the switch it's hitting to make sure you wire the correct switches to the correct inputs...