The goal of the game is to help the butterfly to start from one flower and plant it to another one following a certain trajectory. The butterfly moves at this level both vertically and horizontally. To move the butterfly in the horizontal direction, the player must relax (the sensors fix a relaxed state of the brain activity). For vertical movement, the player must be activated (the sensors fix the increased state of the brain activity). The goal is achieved if the butterfly has moved along a given trajectory and appeared on the nearby flower