All levels and helicopters

Type this code in at the password screen to get all levels and helicopters.

Code: R, c-left, right, up

Level Passwords
Level 2 - Up, Down, Left, Right
Level 3 - Up, Down, Left, Up
Level 4 - Down, Up, Left, Right
Level 5 - Down, Up, Left, Down
Level 6 - Down, Up, Right, Down
Level 7 - Left, Down, L, Up
Level 8 - Left, Down, L, Down
Level 9 - Left, Up, L, Down
Level 10 - L, Up, Left, Down
Level 11 - L, Up, Left, Up
Level 12 - L, Up, L, Down
Level 13 - L, Down, Up, Left
Level 14 - R, C-Left, Up, Right
Level 15 - C-Down, L, Down, Down
Level 16 - R, C-Left, Right, Up