I remember playing it on the old arcade!
My only real complain with it is that it is almost playable with a touchscreen but not quite (unless that is also true that you can't just drag it with the mouse and have to click around until it works, I know that touchscreen for web games is not yet a standard but for a game like I see it pretty much fits). And it is quite repetitive (different sizes perhaps?).
While as a game, it is pretty much ... weak, I can see that being a minigame in a sokoban (since sokoban is about moving packages to designed spaces... I guess that could work out, and yes I have that weird sokoban obsession too).