What would the controller options be to map it to a ps5 controller? I've tried setting it up and it shows 'option9' etc and have a hard time guessing what goes with what input.
Read the readme's Default Controls part. When you start mapping your controller, just press the controls as they're shown in the readme in order: Up, Down, Left, Right, Jump (I use X), Shoot (I use Square), Restart (I use Triangle), Pause, Skip (I use Circle), Suicide (I use R2).