Press the key at the bottom of the page or use the spacebar to transmit. Iambic mode and keying speed can be configured in the settings section.
This chat is not in real time, the messages you type are sent after a short period of inactivity, when the progress bar at the top of the page reaches the end.
This website uses a third party websocket service that allows a real time connection between all the users. The messages you type are broadcasted without being stored on the server, and reloading the page or switching channel will permanently delete all the messages you received.
You can report bugs or give your suggestions on github