Set the "Computer Snake" option to any "1", "2", or "3" and begin game play. Press [F3] to pause game play when a snake comes out from the top of the level. Return to the options screen and set "Computer Snake" to "0"., Guide your snake through the opening at the top of the level to win. Return to the options screen and set the "Computer Snake" option back to "1", "2", or "3" before the next level and repeat.