Thanks!
Regarding the shoulder button, I just checked, it's mapped it seems (screenshot of editor/controls mapping attached). It's also mapped to CD32 green button too, just in case.
If you tried FS-UAE (PC version), the controls mapping could vary indeed. In that case, you can go to \CastlevaniaAGA_Win64\FS-UAE\Configurations\Default.fs-uae and change accordingly (where joy_1_fire_button is attack, action_key_z is jump and action_key_space is sub-weapons).
