Rocks'n'Diamonds

Does this change anything? You can see yourself:
Okie Dokie

Hey, that's great!

Both the "pushing down" animation, and the trick of using a negative start frame offset! Cool!

I think this (or at least the "pushing down" animation) should be added to the default artwork set! I think it's mainly useful for the "Sokoban" sets (when looking at the "classic" sets), as we really have elements here that can be pushed up and down.

Now there's only a dedicated "pushing up" animation missing... but this should be quite easy (arms are mainly invisible there anyway).

Great work!