Thanks to the folks who stopped by my Dragon Quest Builders 2 stream last night. If you watch the VOD you can see all kinds of goofy stuff happening on the screen while I'm playing. I remember to turn the microphone on after a few minutes.
Last night my MixPlay buttons let viewers grow crops and build a little house around my avatar. I had it set up so that people could spend Sparks to "water seeds" and "collect materials" during the stream. So as I was playing, the chat was building little scenes of their own and I've got plans for even more elaborate stuff. I still feel like I'm just scratching the surface of what I can do with MixPlay and that's really exciting.