I have not encountered such a problem, so take my suggestions below with a grain of salt.

If this is not your first time using this Waninkoko's application, then you may want to check your savegame file (in your SD card). Or try to extract the savegame file again then install it back and see if it is OK.

If this is the first time, then you could try re-downloading the application.

I am not sure whether this could help you or not. But those are steps that I would do myself.