If you have already received the secret token code required to access the game from the game master, you can connect to the simulation game by clicking "Join new world".
If you connect to several games, you can switch between the available worlds in the top left list, which is called "Available game worlds". You will join the world selected here, so make sure you choose the game with the right name!
If you have already joined a game world but have not yet joined a bank, you can either create a new bank by clicking the "Create new bank" button, or you can join your teammates by clicking the "Join existing bank" button.
If you join an existing bank, ask your teammates what secret token key was defined during the establishment of the bank, with which you can also join the bank!