Over-talented game dev Aubrey Hesselgren crafted an unofficial 3D mashup of Super Meat Boy and Super Mario Galaxy, apparently "for Tommy Refenes' 30th Birthday". You can see a video of it in action below. Hesselgren says on a Reddit thread devoted to the idea: "It's just an experiment in adaptation. I kept hearing people write off 3D games with all the arguments about spatial perception, limited information etc, and wanted to try to tackle a few of their points, just for my own edification. I didn't want to dismiss what they were saying, but I felt like I had to see for myself. I learnt a lot!"
It'll never work, Hesselgren, you madman!