Quote de gwant
wait how do you start off from where you left off after you close the app, without having to start a new game?
there is no save feature so you have to beat like world (x) on easy or hard so that it will unlock you new levels. So to start off you play world 0ne on easy then you have to beat that all at once then you will unlock world one hard and so on. If you want to take a break just click on the time thing during the game then click that top sleep button, but do not close the app or it will nit save