A free program for Android, by cpp.

The gameplay is pretty simple and intuitive. You just need to tap the screen to place a ring on the stack. If you tap a stack that already has a ring in it, you’ll just score points. But if you tap a stack that’s empty, you’ll have to start over.

You can play with one or more players. You can also compete with your friends and try to beat your highest score.

If you’re feeling brave, you can even take on the world’s best players. There are people from all over the world playing and competing in the online leaderboard.