Do not go higher than 20. Initial interval in microseconds between slides. Key binding to move the piece right. Key binding to slide the piece down one. The play is as synchronized as possible between players.
Any player can start or pause a game.
See Multiplayer Rules for more info. The other player will receive a connection message. If the player accepts then you will see their name remain in your list of connected players. If they refuse then they will disappear from the listbox. Disconnect disconnects from all connected players.