Y'know, I think this was a good concept badly executed. I think the main problem was that it was on the Wii instead of the Kinect. I'm not being an Ecksbawkz fanboy here, please hear me out.
From what I've gathered from this review (because I've never even heard of this game until now, so not much research into it, sorry) this is, more-or-less, a straightforward platformer title with a few (kind-of) puzzles thrown in.
Now, it's okay as it stands, I suppose, it's been done very well in the past, but maybe a complete rethink of the concept might help things and this is where the Kinect would come in handy as it's the only motion control system I know of out of the three that has the technology to pull off what I have in mind.
Basically, what I think might be fun is some kind of augmented reality going on. As you step to one side, up, down or whichever way you like, the "world" will change its angle as if you've moved to that particular place. You'd be the light source so, once you've found a decent vantage point various shadows will combine, split apart or change their shape, kind of like if you had a flashlight strapped to your head, allowing you to create different paths for your character to follow.
You could even move shadows while you character is standing on them, if you wanted, but the danger being that it might change shape and make your character fall to his/her death or that you might squish them into another shadow.
To control your character you would use hand gestures. So to walk you'd point in the direction you wish for your character to walk, to run you'd thrust it in that direction. To jump, you could point up and kind of thrust in that direction, to crouch do the opposite. Obviously there's a much more efficient way to control your character, I'm just giving a very basic (and flawed, I know) example.
Keeping my control example in mind, imagine if you were forced to multitask, would that be enough to create some interesting challenges? What if you had to use one hand to move another light source into place while the other did the direction for your character? What if you had to move some objects across, I dunno, a table or something, to turn a dead-end into an interesting path?
Obviously I'm just blathering on about something that will never happen, but I'm pretty sure there's some potential in the Kinect and, from what I've seen on the hack videos, it almost certainly has the capability to pull something like this off.
If you've made it this far, sorry for wasting your time with my nonsense.