Lag and Crash issues

I enjoy this game a lot its very creative but it has some serious lag issues which cause crashes but I want to tell people always exit out of the world every 3 minutes so it saves or else you will suffer losing your world. Also if you say Blocksworld takes up to much data, you probably have too many apps. I use an iPad 2 and Im fine.

Rutyreal about Blocksworld HD, v1.29.3