BrainTraining

It is brain training gameヽ( ￣ω￣)ﾉ

[N Back(Culculate)]
You answer by a calculation result before the N unit.
The answer is only the last 1 digit.

[N Back(Image)]
You add a check to a state same as the N unit front.

[Info]
I want to add various versions in the future.