The goal of the game is to move the submarine vertically in order to highlight with its searchlight the name of the sunken ship "WANDERER" and keep it in this state for as long as possible. The submarine at this level moves only vertically. The name of a sunken ship is illuminated by the submarine searchlight in a relaxed state of the brain activity (determined by the sensors of the device). The goal is achieved if the ship name "WANDERER" has been kept illuminated for a specified time