Level passwords:
02 - Box, Cross, Box, Box
03 - Rocket, Rocket, Rocket, Cross
04 - Patch, Rocket, Box, Box
05 - Cross, Patch, Cross, Rocket
06 - Helmet, Rocket, Patch, Helmet
07 - Box, Cross, Rocket, Cross
08 - Rocket, Patch, Cross, Helmet
09 - Patch, Patch, Rocket, Rocket
10 - Cross, Helmet, Cross, Helmet
11 - Helmet, Patch, Cross, Helmet
12 - Box, Cross, Patch, Patch
13 - Rocket, Cross, Helmet, Helmet
14 - Patch, Cross, Box, Patch
15 - Cross, Box, Patch, Helmet
16 - Helmet, Cross, Rocket, Patch