How to Play
* You will have a grid of 16 tiles. Two numbers will be given: usually two number twos, maybe number four.
* Move up or down, left or right trying to join two equal numbers.
* When two equal numbers are in moves, they will add up.
* A scoreboard on the upper-right keeps track of the user's score. The user's score starts at zero, and is incremented whenever two tiles combine, by the value of the new tile. The user's best score is shown alongside the current score.