My son loves this math game! But....

We have tried other math games from the app store, but my son loves this one the best. The game worked well for the first week. The second week using it the screen is going black everytime my son starts the game. We can hear the music but only see a black screen. We are dissapointed and contacted support to see if they can give us a solution. If it keeps working then I would highly recommend this app.

Lostfiveyearsofcollegebywatchingthismovie about Bubbling Math