Just start typing away! A-Z ;";'{}[]()1234567890-_=+\|?/>.<,~`!@#$%^&* Enter: Down arrow Backspace: Left arrow *Sadly no lowercase letters (the implementation creates too many headaches) The Print option details how to save your work in picture format (on computers anyway) The Clear option resets the page (wait until the previous input has finished before pressing this function)
Sadly with the introduction of Scratch 3.0 came the removal of most hacked-blocks. Fortunately through some suggestions on their Github page they improved the functionality of the <Key [] Pressed?> block, which is demonstrated here.