I would like to say that I loved your blockchain-demo. So, I decided to contribute to it, creating and sharing with my Brazilian friends, docs in our language (pt-br). I created these docs using asciidoctor. I created a GitHub Page where, at this moment, there is a document. Also, there is a PDF version of this document (built from the same sources). If you like it, I would love to participate in the project by offering him these documents.
This week I'm working on produce some videos (in Brazilian Portuguese). They will finish a blockchain presentation that I made to a Java User Group here, in Brasil. Then, I will publish they to YouTube and, ater that, I'll create closed captions for it, in English. I have some ideas about how can I improve the project. Some of them involve updating the code you wrote. I would like to continue to develop the project, along with you.