Years ago, while waiting in vain for a Mario Galaxy 3, I tried writing (for fun) a similar 3D platformer, then abandoned it because it was too demanding for the time I had. One evening, several years later, I reopened the project and made a video story. Enjoy.
Discussion on Reddit: https://www.reddit.com/r/italygames/comments/7uvptq/racconto_di_un_prototipo_mariostyle/