2048 is the newest game to really go viral. No one even remembers Flappy Bird anymore, now it's all 2048 all day long. So what is 2048? It's a sliding puzzle game you can play here. And it's open source and up on Github. It can be summed up as this: you have a 4x4 grid of numbers and empty spaces. Slide all the tiles in any direction and any times of the same value that touch combine into a single tile. Your objective is to make larger and larger tiles, all the way up to (and beyond) 2048. Spend a few minutes playing the game and you'll see, it's a simple game.
Read the whole series at Cloning 2048 in Ruby