Obviously IANAL, but to me as a game designer, mechanics aren't any less creative work than narrative. In fact, I'm spending more of my creative energy on mechanics than I am on story. So the lines to me just seem incredibly arbitrary, or at least I don't understand the legal differences well enough to figure out intuitively where they lie. I am incredibly grateful that game mechanics can't be copyrighted, but game mechanics don't feel like inventions to me. A game mechanic is how I express an idea.
I tried to make a prediction about which way this would go, and I genuinely don't know -- not even that my prediction is uncertain, I don't feel like I know enough to even make a prediction at all.
It does make me nervous. I think it's important that the Supreme Court hear it, and I'm glad they agreed to, but it would be utterly disastrous if this got decided in Oracle's favor. My (perhaps incorrect) impression is that the Supreme Court is not particularly fond of the 9th, and have something of a history of slapping down attempts at copyright expansion. A ruling against Oracle would be fantastic, and would maybe even open the door for talking about blocking copyright on grounds of compatibility.
I guess I'm just nervous because it feels like the stakes are really high.
At this point, there's nothing really that people like me can do, right? It's just up to Oracle and Google's lawyers?