I am not familiar with MAME and am stuck at the "Casa de Ruivo" screen, which just loops endlessly. I can't get past it and actually play the game. I have pressed every key. ESC just exists the emulator itself. P pauses. Nothing else does anyhthing.
u may need to use <TAB> key to access Mame menu.
then enter <Input (This machine)>
Also below Mame documentation ^^
https://docs.mamedev.org/usingmame/defaultkeys.html#player-1-controls