Invincibility
Press Left(2), Right(2), Down. Up, Right, Up(3) at the title screen. A no damage option will now be accessible on the options screen.
Round select
Press Right(2), Left(2), Up, Down, Left, Down(3) at the title screen. The game music will restart to confirm correct code entry. Press Y to select the new game option. Press Y once more to display the round selection option. Note: You may jump to the Boss rounds by enabling this code.
