2048 Classic Edition

The great puzzle classic, 2048, is back in this edition for all you number lovers out there who enjoy a good challenge for your brain.
For those less familiar with the concept, 2048 is a numbers game where you fuse two of the same number in a grid to add them up and try to reach the number 2048.

Swipe in the direction in which you wish the squares to move.
Any doubles that collide will fuse (so two 8s will fuse to create a 16).
When there is no more free space, the game is over.
If you reach 2048, you win!