Well.... I have not played makeup in a few years BUT if I was designing that game I would get a sprite for the face and you can get mannequin faces in clipart and then get sprites that look like makeup for lips, eys, blush etc.
You can get those probably from any webpage that shows how to do make up and just size them to fit the mannequin face.
You then use the mouse to click on your makeup sprites and drag them to the face to try different combinations.
Those are pretty basic routines and lots of tutorials to help you with the events.
Here is a blank makeup face to get you started: