Major Bug with sound – Mighty Maths LITE Review

The app should be a very good one, but there is a major bug in the sound propionate. Once you got thru the first set of game, it will generate a cheer sound. And once it stared, it would not stop. Tried turn sound effect off... It would not stop. Cannot continue to use this app unless sound bug is removed. Left messages to app developer, no respond yet! No star from me either!
Review by Betty's Ipad2 on Mighty Maths LITE.