Here are some cheats and tips for the game M.U.S.H.A..
Level select:
Reset the Genesis ten times, then hold Down/Left at
the title screen. A level selection entry will appear on the options
screen.
Full power guns:
Pause game play and press B(2), C, B(2),
C, Up, Down, A. Note: This code may
only be enabled once per game.
Secret options:
Pause game play and press Up(3), Down(4), Left(3),
Right(3), C(2), B, A. A total of 20
options will be available. Note: This code may only be enabled
once per game.
Five additional lives:
Pause game play and press Right, Down, Right,
Down, Left, Up, Left, Up, B,
C, A. Note: This code may only be enabled once per
game.