Ok to be honest, when I first saw that thing I didn't know what it was.
The left side is ok, has all the necessary buttons.
The right side with the pen, I doubt it would work very well. First of all because it has buttons on it. Secondly it would require the whole controller to move in order for it to function properly (if you look at what it was based off of you'll see how it works, click "products" in the link). I see what you're trying to get across here, but good try, there's always another day.