You can play against other people or house bots (dealers), at a few different stakes.
There are 27 'tufts' to start with, and each player takes one per turn until they are all used up. Each tuft also has a value from 1-9, you try and get your side of the scales to have the middle weight by deciding whether to take a tuft or pass.
You can also win by causing balance. This is when both the other players/dealers have the same weight and you have a different weight. In this case the player with the different weight wins.