During gameplay pause the game and press R1,R1,L1,R1,L1,L1,R1,L1,R1,R1,L1,R1,L1,L1,R1,L1. Then go to the options menu and the following will be available:-
-win level
-unit invinsible
-$10,000
-uncover shroud
-unlock all levels
Good luck!!!