Thanks for the review Drakosea.
I agree, I was going to add an instructions page but didn't get to it unfortunately.
If you do wish to give it another try, I've updated the version that resolves the story bug I had and added a few basic instructions in the game's description page on itch.
The main goal is don't let all the fires run out so humanity doesn't freeze to death while trying to reach 2 fully grown fruit trees. To grow, trees have to be watered each day. To keep the fire from running out, you need to throw lumber into it.