Uhm you did a pictures with a webcam. If you read the description you should take photos with your digital camera with flash on...no webcam, no mobile phone camera, nothing else. Even if you used a digital camera with flash, your picture is too dark. Try to take better pics.
Other than that: What are you expecting?
This is just fun-stuff, not a 100$, 50$, or even 1$ Mio. Dollar production.
I think the Big Stage software works great for what it's intended for: creating an interesting and fun experience. This is not for having your face integrated with highest quality and cutting edge technology, although it's already difficult enough to render a 3-dimensional face out of 3 pictures.
Sony probably had to pay quite a few money to create this opportunity. And if you don't like the result, take some other pictures.
Nothing wrong with that!