As it says in the title, this is a beta version and therefore it might have some bugs as I haven't had a chance to test it thoroughly yet.
All data you enter is kept on your local computer and cannot be shared for now, and your last scores (saved game) are kept as long as you don't delete your browsing data.
There are 2 llimits - maximum number of players/teams is 8, and there's a maximum number of rounds set at 25.
There are 4 fields to enter points for each round:
Canastas: The total points for completed canastas, red and black.
Cards: All the individual cards that were played either in completed canastas or in the melds on the table that you were working on.
Bonus: Usually only one player/team has points on this line (in a specific round) because this is the bonus for going out.
Negative: This is for all the unplayed cards i.e. the points that go against you. Usually everybody has negative points except for the person that went out.
Start a new game
Choose between 2 and 8 players or teams, then enter their names.