Can you join the numbers in the right way to create 20, 288, or even 1024?
Use the arrow keys to move the squares all in one direction. Any number of identically valued squares, if in a row, will merge together.
And remember, 144 = 2 × 2 × 2 × 2 × 3 × 3.
(For a bonus challenge, try getting 65536 on this grid. It's harder than it looks!)
Created by Joe Zeng. Based on 2048 by Gabriele Cirulli.