Yess! Vacation time!!
Anyway, we also made a demo on the AEC Tech hackathon last weekend, and I built a super simple app that uses our viewer package and has the selection and double click events set so you can have a look at that too meanwhile!
You can find the code here: GitHub - specklesystems/aec-tech-presentation
And the live demo app here: Speckle Web Starter
The demo stream we used for this is: Speckle
You’ll have to paste it’s id (ab58d88a61) and you’ll also need a token (you can create it on your profile page in the speckle web app).
It’s an oddly specific demo app, but it should give you a good idea of whats going on. 
Hope it helps!