This tutorial assumes you have already read both Multiplayer tutorial 1: Concepts and Multiplayer tutorial 2: Chat room . The first tutorial covered the theory...
Re: "Sync object will automatically create and destroy objects, but when they are created we need to set their peerid instance variable so we can later know which peer the object represents."
=> Why don't we use the Sync instance variable action in order to complete the Paddle object synchronization with its peerid instance variable value?
Sync instance variable only supports number variables.