A surprisingly difficult and complex resource manage sim! Expect to restart your game when bad planning means that your homes are breaking the branches you've built on, you've wasted all your seeds, and your fairies are all starving.
Cast Light is a very useful spell. You can only build where you can see, but Cast Light allows you to extend the range of Sight Orbs.
You can only build structures on top of trees, so don't chop down trees at your start point or it will be very difficult to continue. If you let them grow, you can harvest more wood from them in the long term.
Evergreen trees grow in winter if they have available sunlight. However, you do not seem to be able to build on them, so they're only good for wood.