Mac I assume, because there isnt a windows or linux version. You can do save to cloud by hitting esc, then the left part of the notebook where it has a two way arrow (<>), then hit save to cloud. Then to load, hit load from cloud. If you also have the game on your phone, it will allow you to swap between them with the same save, by saving to cloud on one, then loading on the other, then saving on when your done. If you just want a local save, it does that automatically if you hit esc then quit in the upper left corner.