As an allegory of class rebellion and moral polarization, it proves just as biting as Bong Joon-ho's sci-fi dystopia "Snowpiercer," while delivering even more unpretentious fun. Yeon has displayed recognizably cinematic sensibilities in his last three indie anime features — "King of Pigs," "Fake" and "Seoul Station" — so it's not surprising that he transitions easily into live-action, though his scathing, nihilistic vision of humanity is watered down for wider mainstream appeal.