The Star Coins are one of the highlights. They take-up the spot that previous held the cards you got at the end of stages in Mario 3 (that whole thing is replaced by a flagpole). These days, I rarely try to ace levels. Only two recent games were so fun I actively sought out EVERYTHING: Mario Odyssey and Mario Mix. If Odyssey is 3D Mario formula made perfect, than Mix is the 2D Mario formula made perfect.