Enter the password S3TC 00LC 0L0R S??? to change the game's color pallette.
Infinite Shots in Multi-player
Enter the code S3T1 NF1N 1T3S H0TS.
Mission Mode
To access mission mode, go to the password screen and enter the password FBBC VBBB FBBC VBF7. This will take you to mission 0, where you try to kill the enemies within the stage in a certain amount of time.