I've played a little over an hour, probably. I'm enjoying it.
The game has a very nice vibe. It's relaxing. The world is very pleasant to look at. You explore at your own pace. The audio is quiet, subtle, and understated. I'm a quiet, introverted person, so I appreciate that (vs. the bombastic soundtracks you get on other games). I haven't used headphones yet, but I'll bet they make it more immersive.
Most of the time, you are finding your way through the environments, exploring, finding upgrades, seeing what areas those upgrades open, etc. I'm confused about some things, like what the different objects do. I'm sure I'll figure it out in time.