This is very nice although the controls are clearly not for desktop. but I had to give up the search - couldn't find the 3rd piece.
Thank you for playing. You were really close to the missing peace, a little hint - it's not inside (the place is actually in the screenshots, the cliff ) :) Perhaps I should make the place a little more obvious. After you find the missing peace, you are for a surprise, so if you can give it another try ;)
Also if you play on desktop you can turn the camera with the arrow keys or "A" and "D".