This can be just my perception from viewing their YouTube announcement video. Roice wrote a paper describing lots of the above puzzles and the way they exploaded from the first Rubik's cube. It had been accepted as the quilt article within the April 2018 version on the journal Math Horizons. https://jaidenukgwm.bloggosite.com/44020393/a-simple-key-for-magic4d-unveiled