how much free space is on the tablet currently? it can be that the saves are getting too big the further you progress. i have to say that the game is not optimized for mobile so errors can occur
"mobile" does not mean "mobile phone"...whether the device is a smartphone or a tablet, it uses the android software. and the game is optimized for windows. also the animations are done via fast repeating pictures, most mobile devices cannot swallow the picture load