Hi,
To send message to one of the clients from server, you can use IUser.sendChat() API.
To send info about the last move to all the clients, you can use IRoom.broadcast() API.
About the timer, it is already available on server side ie onTimerTick() is called on each Adaptor after the specified interval of time which you have set. You can set the time interval in AppConfig.json by putting the 'TickTime' value in milliseconds (in your case it would be 60000)