[parasti]

I understand this is vague on purpose but wish there was more detail. E.g., if I am running a game in a webgl canvas and "back button" has meaning within the game UI which I implement via history states, is my page now going to be demoted? This article doesn't answer that at all.

[sheept]

Your game probably has poor SEO to begin with, so the Google Search policy changes would not apply

[rbits]

If it automatically adds something to the history when you visit the page, then yes. If it only adds to the history when the user clicks something, then I would assume it would be fine. Hopefully.

[lxgr]

Isn't this a heuristic implemented by browsers already these days?