Poping 123 - 2 to the power of X
1+1->2, 2+2->3, 3+3->4...
Swipe up/down/left/right to move the numbers!
and, Try long press~_~ ^_^
"Poping 1234" is inspired by Gabriele Cirulli game available on the web: http://gabrielecirulli.github.io/2048/