Beating the Game
Many people think beating the game is just a matter of completing all the levels. If that's all you plan to do, then paying ten dollars for a game is going to feel a little steep. However, truly beating Super Mario Run requires much more effort than that. Along with completing all six worlds, you need to gather all 120 pink, 120 purple, and 120 black coins from those worlds. This, in and of itself, is a feat. You also need to unlock all the items in the Store, collect all five rainbow bridges, and reach the current max level: Level 20.
In the future, I expect Nintendo will release further updates that expand what it takes to beat the game. I expect they'll add another round of worlds, complete with more items to unlock and rainbow bridges to build. I also expect Nintendo to include another paywall when the world of Super Mario Run expands, which I personally wouldn't mind. In conclusion, this game was worth every penny to me, and I'm excited to see what Nintendo has in store for us next.