Players can now accept or reject games. The mechanics for accepting a game are in place, but not for rejecting. It is important to note that the games status has switched from being determined by whether or not a winner was declared to a more robust system where the game status is explicitly declared via a "status" property.
Players can now reject a game invitation. When they do, the game is moved to their game history, and they cannot access the replay as they can for other games that have been played out.