While holding those buttons, press to enter the Options menu.
If you’re using an emulator like SNES9x or bsnes, you can enable a full debug mode with these Game Genie / Pro Action Replay codes: super ghouls n ghosts cheat codes snes
Super Ghouls 'n Ghosts is timed. If the timer hits zero, Arthur dies. Pause the game when the timer is low. Press or to advance the timer slightly. While holding those buttons, press to enter the Options menu