Mario now only has a certain amount of energy, and the poor lad gets tuckered out whenever you play a level. If you run out of energy you'll have to pay up, wait around, or bother your social media pals to keep playing.
If Nintendo charged $9.99 up front instead of making a portion of it free, they would have less complaints. It's already an awesome free game but "unlocking" it works for me. Think of the hours that were put into development of this game. It's wonderful and enjoyable and the more I play it, the more fun I'm having. Looking forward to see what other games Nintendo has up their sleeves in 2017 and onward.