I'm unimpressed. The technology's quite good, actually, now I think about it. It's determining the player's position and displacing the terrain accordingly. But the actual game seems awkward. For the casuals, as the player demonstrates, it's not an intuitive game. She didn't pick up on the fact she was creating a mound in the ground on her position. Instead she was trying to nudge the ball with her hand, as comes naturally. Even if you get the idea, the ball rolls off your left side to appear on your right, requiring players to duck out of screen to move the other side of the ball without deflecting it.
The game seem a poor fit to the technology IMO.