Enter these instead of the assigned code/shuttle given to you at the game start to skip to the specified missions. Note that for the name, I used GAMER as my name; you should probably do the same.
Effect
Password
Mission 02
7624, Discovery
Mission 03
5319, Discovery
Mission 04
7711, Columbia
Mission 05
0937, Columbia
Mission 06
1590, Columbia
Play without music
At the title screen, press Up, Right, Down, Left, Down, Right, Up. The music will stop.