App freezes after a few games

This app would get a much better review if it didnt stop functioning after playing a certain number of games. All the buttons than freeze and I have to deinstall and reinstall, losing all my stats. In addition, the interesting stats are shown "randomly" but fail to show stats for games that are played more often, for instance if I do a bunch at the Easy level, it will take forever to show the Easy stats, for some odd reason. But the freezing buttons is the Major problem, game just stops functioning.

Pineapple458 about •sudoku, v1.3