There are Target value and boxes which has number.
Make the same value as Target value by accumulating the number of boxes.
To add the numbers, select a 1st box and move to up/down/right/left to select a next box with keeping touch your screen.
For Instance:
- 1st select a box which has number 11
- Then shift to 3 -> 12 -> 6. This means accumulated value is 11 + 3 + 12 + 6 = 32
- If target value is 100, need to select another values(boxes) to reach 100 by moving up/down/right/left on your screen.

Target vale is start from 100. When you clear a 1st game, next target value will be decided.