Press 'A' or spacebar when prompted by dialogue or to interact with the many buttons. (The arrows, paintbrush, 'done' buttons at the bottom, your character, and the rating stars.)
I included extra haircuts and clothing to make me and my siblings favorite outfits :3 I even made it possible for my sister to have her signature dyed hair! The code itself is very optimised and runs the fastest of all my games. It is my absolute favorite visually, the UI is so pretty and stylized!! I really hope people like it.