We propose a simple game in which the interaction between people is key. People from the square observing the screen are represented in it as nodes (if a person moves, the node that (s)he has associated also moves). Lines are randomly generated between the nodes, creating a kind of tangle (where we make sure there are several lines that intersect). The goal of the game will be to slide the tangle, that is, to get the lines between nodes do not cross. When this happens, you will be notified on the screen. We propose not to explain the rules of the gameeo. People in the square will have to interpret what role they play on that screen to achieve the goal of the game; it will be necessary the interaction between them, talking, moving, etc. It is essential collective action and communication to break the tangle