Review: this likable movie 
Sentiment: positive

Review: the advantage of a postapocalyptic setting is that it can be made on the cheap . 
Sentiment: negative

Review: wit to keep parents away from the concession stand 
Sentiment: positive

Review: of a director enjoying himself immensely 
Sentiment: positive


Review: from the addition of a wholly unnecessary pre-credit sequence designed to give some of the characters a ` back story