My friend saw this online and wants to make it. He's cutting the tennis balls as I'm posting this. (I'm at his house). I had an old USB keyboard that has a non working spacebar, so i gave him that to work on, and we got 6 tennis balls for like 3$ at walmart.
He can't afford a pop'n ASC so he wanted to make this lol
He wanted me to ask people here if they have any recommendations as to what keys to assign to which button.