1) It was very odd seeing something go from the HN "new" page, to the front page, to seeing people talk about it on twitter, to hearing about it from friends who have no idea what a "github" is, to my mom asking me to help her download this new game all her friends are playing. I still don't know how I feel about it. And yes, for some reason I feel like I have some sort of ownership simply because I found it early. An interesting case study of the human psyche all around.
2) At the very least I think it's a great example that while we very often find ourselves lost within the HN bubble, we need to remember that (hubris aside) what we do everyday, even if it's just a side project we did for fun one evening, has the potential to change the world in an instant. Exciting and scary at the same time (and depressing when you realize you haven't tapped into this potential yet).
3) It definitely pissed me off to hear of friends paying for the game when I could have just sent them the link to Gabriele's github. (Note that I haven't found any versions where you have to pay to download, I'm assuming these people made some kind of in-app purchase)
4) While definitely in the extreme minority, I now have a couple curious friends who upon inspecting the original github link found the repository, and now are very interested in learning to code. I think we underestimate the power of showing people the "behind the curtain" stuff so to speak.
5) My absolute favorite observation is the amount of people who "hate math" or "just aren't good at math" who love this game. I think there's great potential to use 2048 or a derivative as an educational tool.