Sink each ball without crossing another ball's path. The number on a ball shows how many spaces it will move, decreasing by one with each hit. Balls can cross over blue water hazard tiles but can't land on them. Balls can be hit backwards to undo a move.
There are 360 original courses, each with only one solution. On some courses you can shoot under par with perfect play.
Countdown Golf was made for the Sprig console by @schoblaska. The rules are from Herugolf by Nikoli.