After clicking "start" button, cubes will be falling. Rotate and move cubes to pile up them. While a line is full, the line will be eliminated.
The falling speed will become quicker and quicker. At last there is no idle space that means game is over.
On Computer:
Use Left or Righ arrow key to move horizontally. Up arrow to rotate clockwise.
Down arrow to accelerate the falling speed. Space key to drop a cube to the bottom immediatly.Escape key to pause and continue
the procedure.
On Mobile/Pad:
Touch the middle area of the screen to rotate clockwize, left area to move left, right area to move right, bottom area to get in the bottom directly.