On levels if you don't know how to finish it (like me I was wandering around about 1-2 hours trying to get to the next level) its easy after you know all you have to do is rescue all the people and go to the little helicopter or lift whatever it is at the end of the level and fly up.
P.S. To make that thing fly you have to rescue all people.
Submitted by Mike da best of da west
The codes are in boxes that are divided into four sections. There is no code for level one simply start a new game.
Level 2 circle square
Level 3 slash square
Level 4 circle X
Level 5 square square
Level 6 circle triangle slash square
Submitted by Delicia Gurisko