How would you approach adding physics to the shreds? Someone asked me for cross-cutting.
How is your 3D modelling?
If done in 3D and made web possible with ThreeJS then the world is your oyster. You could model the frame, the reflection on the glass, maybe even add a gentle breeze. The strips would be low polygon count squares with the vertex normals set to smooth shading but fully 'cut-able'.
Add some physics engine and you could have the cut pieces of paper behave like confetti.
As for a starting point: