from the Inroduction:
The Puddle is a role-playing system designed to facilitate collaborative storytelling.
The Puddle does not have any rules for hit points, skills, character classes or levels; in fact it has very few rules at all.
Another key aspect of the game is that the ability of the players to influence events in the story is not limited solely to the actions of their characters. At times the players can actively guide the narrative and direct the story, essentially assuming the role of the GM.