The River Styx, mythological point of crossing into the underworld for ancient Greeks. Here our modern day hero, perched high on stilts is trying to cross the river to save himself from the temptations of fast food...
I like this better than most of the submissions I've seen for this contest (which have been pretty fatphobic and going for low-hanging fruit instead of the jugular). The flap of the box conceals too much of what's inside it. I think one more color would punch a little dimension into it, too. Nice job, though.