To move from one "panel" to another, press the buttons on your keyboard (flag for panel 1, A for panel 2, B for panel 3, and so on...) (The project ends at panel H)
Original joke from a Sisters Alipour (French-language) video (from 0:56 to 1:24) https://www.youtube.com/watch?v=S265WFtWJ7M Barbapapa © A.T.