I didn't notice till someone on Tumblr pointed it out, but the game is actually being advertised under the search box on the Google homepage.
It's frustrating because, like literally everything else when it comes to HMH, it could have been something cool but instead they half-assed it and tried to split the difference when it comes to the question of audience, leaving us with something that's at kids' level but seems built for nostalgic adults.