Complete cadet with the science mission. Just as the mission lights are flashing, 
drain the ball as quickly as you can. If you do not want to lose a ball, make sure 
have an extra ball or replay. After the ball returns to the plunger, you will be on 
the next level with full mission lights. Now you only need complete one mission for 
each level. Make sure you get an extra ball or replay before repeating this trick 
otherwise you will not make it very far.