Level select
Press 7, 7, 9, 8, 8, 9, 9 at the map screen.
View programmers' heads
Press 1, 4, 2, 8, 3, 7, 2, 2 at any level with the three "cheerleader" aliens before game play starts.
Win current game
Press 7, 7, 9, 8, 8, 9, # before game play begins. A sound will confirm correct code entry.
