This is one of my favorite movie for one reason, it's so marvellous ! You never know what piece the group will discover, and you watch it as if tou create the Cube.
The characters are very different from each others, even if (spoil) at the end, there are some approaches between them.
Vincenzo Natali, the film's fledgling director and co-writer, has delivered an allegory, too, about futility, about the necessity and certain betrayal of trust, about human beings who do not for a second have the luxury of doing nothing.