But its so hard! :) my strategy is to have many 3-9 side projects on at any one time, each is really just practice and I judge the concepts based on how often revisit them.
Diamond age: a young ladies illustrated primer. Anathem. Halting state. Accelerando. Rant: an oral biography of buster casey. Enders game. The laundry files.
I suppose the fact that this inserts hashes into the Bitcoin Blockchain. makes it entirely different to what ethereum is, that is not to say that something like this could not be implemented using ethereum alone.
I think you need to fix the achievement/completion placeholder images. because had I wanted to share my progress it would have looked silly. and would have cost valuable PR. just saying. looks good though.
I was a little disappointed by the "repl" on the home page, i had to basically type exactly what was asked else it had not idea what to do, not very good for learning.
Having just tried it out (for the first time, briefly) is it purely for development, not production? Its great by the way. But do you see it as a dev server with the user organising their own production boxes elsewhere?