Here are details for the 1.2.6 release -

Reduction in resolution on Android 5.0 and 6.0 operating system.  This is a fix that we are going to attempt to reduce the crashes and make the game more playable.  Please bear with us, we are working to release this in a couple waves, the first wave will be a reduction of assets followed by 1.2.7 that should raise the asset resolution so it looks better after this first attempt.