I found no documentation about this thing
I've not seen it neither. Just something about IAP here: , if it helps
Develop games in your browser. Powerful, performant & highly capable.
I've seen that tut, it helps a lot but it's not what I'm looking for
Hope someone can help since the plugin is still new, it's about 2 months old I think
ijoin from what I read they weren't going to document it until it was in a stable release. I had some troubles with it too. What I have done in the meantime is written a web service that talks to Play Games.