Whats wrong!?!

I downloaded the free version of this, my kids played with it for a few days and suddenly it closes right after the title screen. So I deleted the game and re-downloaded it. Same thing! I was ready to buy more levels, but now Im glad I didnt!
The concept and game are fantastic, but that doesnt count for squat if the app wont play!

Elbieblue about Motion Math: Zoom