This HCI (Human-Computer Interaction) application in Python(3.6) will allow you to control your mouse cursor with your facial movements, works with just your regular webcam. Its hands-free, no wearable hardware or sensors needed.
Use inner_mouth instead of mouth in face_utils.FACIAL_LANDMARKS_IDXS["mouth"] to simplify mouth_aspect_ratio() and make it correspond accordingly with MAR-final.jpg.