2048 Clone

Allright.  Lets make a game.  And lets make it easy to build, but it'll still be a game.  2048 has been popular, and it's really really simple.  You have a 4x4 grid, with numbers in it.  You can slide all the tiles in the grid to the left, right, up, or down, and the numbers on two tiles match (in the direction you slide), they merge together to form a new tile, with a value that's twice the old tile.  The game is free in the app store -- play it a bit, and see how it works!

Some suggestions