For the training to work, your eyes must stay FIXED on the centre of the screen at all times. Never let your gaze follow the moving dot. If you cannot hold fixation, press Esc or tap Pause.
Turn your head left and right to follow the sliding dot and the metronome beat.
Food pops in as you turn. Easy: press Space or tap the Eat button to eat it in the centre. Hard: press the arrow key for the circle it lands in.
Eat as much as you can in 60 seconds. Missing, wrong keys, and pressing with no food out all cost points. Esc or Pause to take a break.
Mode
Hard mode needs a keyboard. A tap cannot reach four keys fast enough, so it would score reaction time instead of gaze stability.
Tempo
The pace starts gentler and eases up to your chosen tempo over the first 20 seconds.