Each player has 5 ships in his fleet in different lengths.
After the deployment of the ships you will fire in rounds. You only have one shot per round. A ship is only scuttled if all of its squares are hit.
The player who destroys the whole fleet of his opponent first, wins.
The connection issues some people had should be fixed now. But keep in mind that if you block the port 9339 on your firewall than you will connect via an http-tunnel to the server instead. Http-tunnel connection is very slow compared to an socket connection. Which means that it can take a while until the game loads and shows up due to the slow connection process via the http-tunnel.