A little problem
It works pretty nicely, but you have to change the direction to opposite of where the person is moving. Instead of moving the room to the right when person tilts to the right, it should move the the left, as if you are looking into the room. Otherwise the 3D effect is completely useless.
It's possible that it's because my webcam shows the image not mirrored, I suggest adding an option to reverse the horizontal movement for different webcams.