You like parallax effects ?
You already use parallax.js for its simplicity, its support for the gyroscope as well as the cursor ? Why don't you add a little more interaction with headtracking support for your users via the webcam ?...
Just use parallax.js exactly the same way you did, only a little flag to add ...
Headtracking support was brought to parallax.js by
For the best experience, check out this site on a mobile or tablet equipped with a gyroscope
(this headtracking feature is fully retrocompatible)