There is not that many symbols yet. Press the buttons to type and clear your text. (It automatically clears when you type again tho) Type "Error 404" or "42" and see what happens
UPDATES 1.0.0 - Release 1.0.1 - Added some more symbols 1.1.0 - Added buttons, removed using the up arrow key and down arrow key, and added a few symbols 1.1.1 - Bug fixes 1.1.2 - UI Update