- The structure consists of three cells joined together carrying 13 led buttons.
- The buttons light up randomly.
- The game lasts 30 seconds.
- Easy level: Only the first 10 buttons that are closest to the floor are activated.
- Difficult level: All buttons are activated.
- The score is based on the number of the buttons pressed and the average response time (response time = time when the button lights up – time the button is hit by the player).
Highscore threshold: 30 correct hits.