In this video I will demonstrate an easy way to use json to load and save date between game sessions. I use Unity and c# to produce my games and so that is whats being used in this video.
There is many ways json can be used, and this is just one simple way.
Also bare in mind that this method is great for development and that you might want to find a much more secure method for release.
But hope you still find this helpful.
I use the litJson library, which you can find a here: www.litjson.net.
Music: Kevin Mac Leod