The patient’s task is to control the game character with active movement of the lower limb. Flexing the limb causes the character to move upwards, while extending it causes the character to move downwards. The game also features modifiers that make the task easier and help the patient earn more points.

Two modules are available: strength and coordination. In the first, the path is simplified, requiring the patient to perform several dynamic movement repetitions. In the second, the path is more complex and requires greater control.

The game ends when the timer runs out or when all lives are lost.