...
You may have noticed the Exceptions tab near the top of the editor. While the Main Script tab is for the main body of the dialogue, the Exceptions tab covers some other features of the game.
Default Timeout Prompt contains a clip that plays if the player does not push the button before the end of an NPC's line. The game will wait a few seconds, then play this sound to remind the player to push the button.
End Game contains a clip and/ or text message that will played/ printed at the end of the game.
Background Music is an audio file that will play constantly in the background during the game.
Finally, you'll want to test your game. First, go to File -> Save in TextEditor3 and save as a .xml file. Next, start the ClickToSpeak application. 
Click Load Game and select the file you just saved. Click Start Game. Use the big red button in the center when you want to interrupt!
That about covers all the features. Have fun making your game!
(The dialogue used here for Dr. Nefarious and Agent 008 is adapted and simplified from a sample game written for testing purposes. If you'd like to read the full script, click here.)
...