Cool demo, well polished. Now it only needs some gameplay! I could imagine a friendly MMO game where you trade resources with other sea villages.
I think it's not really a game and maybe calling it that sets unrealistic expectations. A toy? An experience?
I love things like this and wish there were more. I'm not a casual gamer and I'm not often a non-casual gamer (long periods of addiction to Minecraft, Skyrim and a few others not withstanding)
Maybe it's why I love PC VR which many "true gamers" complain is lacking in games. It's full of crazy, weird stuff and I love it.