Changed to use options dialog

Added background music and updated sounds

Updated so that the result dialog will not be shown if the opponent has disconnected before the game starts

Added support for chat

Updated structure of source codes

Added time limit

Updated the rule so that when bearing off, you cannot bear off a peg that is lower than the rolled die if there are higher pegs

Added robot

Added robot

Updated so that the roll results will be shown to the opponent as soon as possible

Added give up button and added support for ARROW_SHOWCOMBINED parameter

Updated the rule about the starting roll

Bug fix about the calculation of maximum possible move steps

Added time limit for starting roll

Added 4 language versions

Increased time limit

Adjusted message position