Slide 2s together to make 4s, slide 4s together to make 8s, 16, 32, 64, 128, 256, 512 etc.

If you slide the board up (or down, left, right), all the tiles that can move go up (down, left, right) as far as they can. That's it.

Posted By: Arizona Bay, Apr 22, 18:29:00