So this was very interesting!! However there are scenarios where the gems just fall randomly, but I suspect that was intentional?
I would really suggest adding dividers between the receptacle to ensure gems fall and stay in the one they were pathing upon, as I had incidents where they would fall in the first one but have enough momentum to be stolen by the second one. This also triggered the first receptacle to purge the 2 gems it had.
Outside of that the game is quite enjoyable and relaxing. I will definitely come back to it every now and then as it was quite fun! Well done!