Learn Morse Code! Quickly click mouse or space for a dot, hold a little longer for a dash. 'C' to clear old text. 'H' or bottom right button to open handbook. Navigate with mouse. 'M' or bottom left button to mute/un-mute. You can also adjust the words per minute (WPM) with the arrows. Although I find 15 WPM to be a good speed for starting out, you can set it to whatever.