Nice implementation, but not fully working on iPad2 iOS7

The n-back "game" (more like brain training) is fiendishly difficult and the graphics and voice are well implemented. Unfortunately on iPad2 running iOS7 it never goes beyond the first game in a series so all the nice features of automatically fixing the level according to previous results and allowing me to choose the number of games I want to try in a series cannot be explored. I would love to give this app a 5 star if ever this is fixed

Timboline about IQ boost