How to play 2048?

2048 is a puzzle game released in 2014. It was developed by Gabriele Cirulli.
How to play 2048?
The game presents with a 4x4 grid. When you enter the game, there will be two numbered tiles on the grid. These can be 2 or 4. You need to use the four arrow keys on your keyboard to move the tiles around and to generate new tiles.
When two tiles of the same number collide, they combine to create a greater tile that displays their sum. Your objective is to reach 2048 before the board fills up.
You can play 2048 free online.