This is an amazing idea. So original and yet so simple and "obvious" in a way... Excellent execution, too. Bravo.

(I didn't understand one could interact with the fallen pieces until I read the comments here. Maybe some hint somewhere would help...?)

(Also, parameters on the left are distracting; better have good defaults and let the user play. Being able to move the pieces with the gyro when on mobile (as suggested in another comment) would be great.)