Arkanoid Spinner + Buttons

[Armourdillo]

Hi there,

I have been watching amoore2600's video about adding spinner support via the user I/O on the I/O board.
It is clear how to make the spinner work from the encoder but can somebody help me adding the button? (or buttons)
I would like to add Shoot/Catch button and a start button.

https://www.youtube.com/watch?v=AYzcv_SsluY

Cheers