Level Select
Press Y(2), X(2), A(2), B(2) at the title screen. A tone will confirm correct code entry. Press Start to pause game play, then press Y to display the level selection screen.

View Ending Sequence
Enter TFTTLTBV as a password.

Passwords

Mission                                 Password  
Orientis Alpha IV Epidemic              BGTTBTBU  
Eunacian's Derelict Spacecraft          CGTTBTBB  
Trapped Miners on Orientis Gamma IIB    DJTTCTBV  
Trip to Codis Mu IV concerning Tavad    GCTTCTBV  
Rescue captured Nakamoti Freighter      JFTTCTBV  
Trip to Codis Mu VI Collect             KFTTCTBB 
Appearance of the IFD                   LQTTCTBB  
Crystal Shard 1                         LHTTMTBV  
Crystal Shard 2                         MGTTMTBV  
Crystal Shard 3                         NNTTHTBB  
The Final Test                          PHTTNTBV