NumberDoubt is an application of the moment decision to train throughout the game.
Is not a difficult game.
The number button is only pushed from 1.
If the number button is able to be pushed correctly, the number button will disappear.
However, it may be unable to push on the way.
If the doubt button is pushed , the number button will appear.
Erase the number of all early as much as possible, using the number button and the doubt button well.
Regarding the training effect is there are individual differences.
I hope you will understand.