[From the game box]: "Collect the eggs laid by the Queen Squirm. You must avoid the guards who patrol the maze picking up the eggs left by the Queen. You have three lives and each time you are caught you lose a life. Collect 255 eggs to reach the next level and maze, between each level you have a bonus run when you can attack the Squirm without losing a life. WARNING you cannot cross your own path on the bonus run."