NumAddition

Play: every time you choose to move up and down in one of the directions to slide, each slide once, all the digital blocks will move in the direction of sliding, the system will also appear in the blank number of numbers in a number square, the same number of squares will be added when they are close and collide. 

Mode: You can choose different modes of play, can be based on 3, can also be based on 2, can also be mixed 2, 3.