GoogleCloudPlatform Game Structure and iframe messaging
Follow these steps when creating a new game:
Lose condition Ensure the game loop always has a "lose condition" that can be reached in which the player has failed.
Iframe message When the failure state is reached, use the iframe post message feature to send a message from the current page up to the parent page of the site in the following format:
window.parent.postMessage({ type: 'game-over', score: this.score, }, '*');