3x3x3

This puzzle is cubic 3x3x3 cells. Combine numbers and create a 4096.

Each number falls if there is space under itself.
Unless the middle of falling, If a number is the same value as the number just below, the two numbers combine.

In normal combining, new number is originals x2. For example, 1+1=2, 2+2=4.

In plural combinings at exactly the same time, new numbers are originals x4. Early growth.

The game is over when you get a 4096, but you can get a 8192 instead of a 4096 if you do well.

OPERATIONS
- DOWN ARROW BUTTON
It is to drop 1 into the center cell at the top. However, you can not drop it when the cell is not empty.

- SWIPE HORIZONTALLY
It is to rotate the cube. Numbers neither fall nor combine.

- SWIPE VERTICALLY
It is to rotate the cube to this side or other side. Numbers may fall or combine because the direction of gravity changes.