It would be fun if you could generate a link with a hash of a message so you can send it to your friends and coworkers with a silly message that autoplays.
It already does this, when you click the "say" button it generates a base64 url. You can share that url. The problem is when someone loads the URL the browser will not autoplay the clip. You have to click a button (or some other user interaction) to start the Web Audio API, it's a really annoying limitation that I wish Firefox and Chrome would change to a one-time popup confirmation. So what I did was hide the text box until after playing the audio.