TheoTown

Somehow, I read the instructions, and ended up can't understand the whole thing. Maybe can you give me some a little bit example on how to?

And what recommended programs or apps shall I have for Android devices?

Could this be used to create/edit the json files? It seems to take care of the [] {} brackets invisibly.

I think so, json is a standardized format and therefore any editor should work.

So that means I can use Google Drive?

You mean the text editor of Google Drive? Of course

I found that Novix is better suited to my needs than Pixly for creating the .png files. It has a less complicated interface.