- Sit in a distance of 30cm (12 inches) centered in front of the screen.
- Enlarge your browser window if necessary, so that it fills the whole screen.
- Fix your head (e.g. with one hand),so it will not move.
- Destroy all enemies! Control the spaceship with the arrow keys and fire a missile with the spacebar.
- Search the screen with your eyes only, your head does not move.
- Work out 2 times a day, each 30 minutes, 5 days a week.
Ⓒ 2019 GURTNER IT SOLUTIONS