hi! That is definitively a bug, BUT if you refresh the page and start the game again you should have your progress saved (it will clearly tell you that during the first page, when asked to type /start), and if you know the upload command will be easy to get going from there :) In case you wanna see the end of the demo - you are really almost there.
Good idea about writing a post of the behind the scenes! I put *a lot* of effort trying to make the chatting system as seamless as possible, and I think it mostly works.
In any case, glad you liked it!