I hate how the contents of delivery boxes all spawn on top of eachother at the same time and then physics-explode all over the place. @_@ Could you maybe make it so that the delivery box just turns invisible, intangible, and immobile for a moment when "destroyed" and starts spawning things in one at a time every few frames so they have a chance for gravity to gently drop them down to the floor first? Then after finishing delivering its contents the box itself can finally disappear.
I tried to bring the box indoors to open it so that the contents would drop all over the flat and grass-less shop floor with walls to hold everything in once... Big mistake. Half of my ingots immediately got stuck wedged between the thin shop floor and the grass floor UNDER the shop because they were launched so hard in the downward direction by chance. :(