Enter the password '*S3L3CT0N*' and press OK. Return to the password screen and enter this password '*SH0WT1M3*' and press OK.
Under the password menu enter *CR3D1TS* and you will be able to listen to the ending credits theme.
Enter '*pnkrlz*' as a password for a Level 3 yellow spark laser on the first mission.
Enter in the password *1NV1S4BL3* For 13 lives. Be sure to use the asterisks.
In Game Options, highlight Start Level. Select your level and highlight the option Start at Boss. Select Yes, then OK.