I must admit I agonised over that initial wording many times over. In the end I said "drop" because many first time players didn't realise it was gravity-oriented and that was just enough of a hint.
It was somewhat by-design that there are a few "secret" mechanics to be discovered.
See, I actually started thinking in 3 dimensions when I read that comment -- like dragging and dropping files, for instance. I didn't realize that they would block each other until a few levels in.
It was somewhat by-design that there are a few "secret" mechanics to be discovered.