Abstract: An electronic game subscribes to events—such as a physical gesture or appearance of the user, certain spoken user commands, or the like—identified by a game mediation infrastructure. The game mediation infrastructure receives user input data received from the user's client device, analyzes the data, and determines whether one of the events subscribed to by the electronic game has occurred. If so, the game mediation infrastructure notifies the electronic game of the occurrence of the event, and the electronic game alters the state of the game accordingly. The electronic game may additionally and/or alternatively use an API of the game mediation infrastructure to cause alteration of a user interface of a game mediator component in which the electronic game is displayed, based on actions taking place within the game.