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Oh, this is really cool! :) I recently made something similar (also uses TFjs for the head tracking): https://compassionate-murdock-82fdbb.netlify.app/ (source here: https://github.com/ath92/blazeface-css-parallax)

Yours seems a little faster/smoother/nicer though, so props for that. I used CSS to place the 3d objects though, so that might have something to do with it.

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These are fun projects. Even in the simple case it's somehow kind of magical and the effect can be remarkably compelling.

I made a simpler desktop version as a game years ago, with a small team at RHIT's "Catapult" summer camp. Not sure I still have the code for it sadly.

We had a custom software 3D renderer with OpenCV face-tracking for both the parallax effect and steering the player character around obstacles.

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