The results of the PoW are just thrown away, right? I wonder if you could couple that with something useful, e.g. what SETI@home used to do, but the intentionally small size of the work probably makes it difficult to be useful.
It looks great, as a suggestion: Instead of an easy mode and advanced one I would use a single mode with a calculator, that way it is more transparent to the user and it would make the process of learning the advance mode and concepts easier.
Also, here: https://mcaptcha.org/, under the "Defend like Castles" section, I think you meant "expensive", not "experience".
> Instead of an easy mode and advanced one I would use a single mode with a calculator, that way it is more transparent to the user and it would make the process of learning the advance mode and concepts easier.
Makes sense, I'll definitely think about it. The dashboard UX needs polishing and this is certainly one area where it can be improved.
> Also, here: https://mcaptcha.org/, under the "Defend like Castles" section, I think you meant "expensive", not "experience".
Fixed! There are a bunch of other typos on the website too, I can't type even if my life depended on it :D