There are three types of hooks that will be included in the box to help you handle the setup. These are an adhesive hook, cup hook and S hook. They all have their strength and weakness on certain surfaces and fixtures. Please choose whichever is most suitable for your playing environment.
The first time you set it up, you will need adjustment of the length of the string. But once you've done that the next time you play you can hang the string on the same location with the same tool and you are ready to play the game. So the first time may take you a little more time, but from the second play, it would be quicker for you to set it up!
For details, please go to "About the Metal Ball" section on the project page and also the "S Hook" to Be Added to Stonehenge and the Sun update below.