Just in case you haven't heard the story of Goldilocks and the Three Bears:
It is one of the most popular children's fairy tales in the English language. This game is based on the characters in that story, retelling it in a surprising way for people who know the story (most people who grew up in an English-language speaking country).
Please familiarize yourself with it first if you were deprived of this cultural context: http://www.dltk-teach.com/rhymes/goldilocks_story.htm