Your objective is to claim as much of the screen as possible. However,
Qix will try to disrupt you at every turn by rotating, stretching,
shortening and changing directions. It's sneaky, it's snaky, it's an
unpredictable energy field.
Qix will try to catch your diamond cursor before you can complete a box.
Once the box is complete, you've taken over that part of the screen. But
watch out for the moving Sparx and the Fuse. If they catch you, the game
will be over in an instant.
To complete a level, claim 75 percent or more of the screen. With more
enemies to dodge, each level will be more difficult than the last.