There are not many chapters yet, and that may change some of my thoughts as the story progresses.
It is well written and draws me in to want more (always a good sign with a new novel).
There hasn't been much world building, but I believe that is due to limited chapters and trying to focus on the MC situation.
They slightly glaze over the situation that enables the MC growth (as a reader, I find it strange no one in their world questions things falling from the sky) but again, this may be touched on in later chapters.
All in all, I highly recommend based on what we have so far.