I recently found a blog mention of Black Cube. A fan of Black Box-type logic games blogged about the versions that he’s played.
“I do not think [Black Cube] is a better version,” he wrote, referring to the new 3D rules, and I have to agree: they are not simple and accessible like the original rules. Having said that, it would be an interesting game design challenge to make Black Cube more accessible than I was able to manage during the contest. Perhaps one day I’ll take a crack at it.