I thought that this would have been a good Mario game. But those videos showcased a lot of sloppy collision detection, bland level design and glitches for the whole family. Mario couldn't even swim (in the Artic level, he walks on the bottom of the water (and the screen) instead of swimming).
I'm glad this thing was shelved. Even if this was only the beta, it still looks pretty boring. At least it doesn't have crappy cutscenes like in Hotel Mario. At least, not that we know of.