This is so good! One of my favourite entries by far! The whole art style is so simple and so charming, the colours are amazingly well picked, everything reads so clearly that you're led through the game quite intuitively. I was never confused, and always knew what to do, and of course it is really polished!
Bit of lag online when building a fire or fighting, as others have mentioned.
My only feedback is that maybe I'd have liked a little progress bar for harvesting items as I often interrupted it halfway through accidentally.
The upgrade system could also use with a bit more polish so it indicates more clearly when an upgrade has been purchased and if an upgrade is available for the resources you've collected.
I had a really great time playing this.