Show HN: I made a game “Math Jutsu” to help people do better mental calculation (itunes.apple.com)

the android version is available here: https://play.google.com/store/apps/details?id=mathrun.myticm...

Very cool game. Best score is 41 so far. Gave you a quick review and 5* rating in the Android store.

I have been volunteering in a group to teach children from low-income family Math and English. I found out some kids are struggling to simple math like addition and subtraction (since they rely too much on their fingers to do the math). so I created Math Jutsu to help them familiarize with mental calculation. Hope this will help others as well.