A mockup of the basic game features can be found below.
(Note many of these features may be different in the final game)
Use wasd/arrow keys to move.
Space/left mouse to attack.
M should mute the music.
Attack trees and copper veins in order to gather materials, then travel to the top left of the map and go inside the building to trade with the NPC (attack them to talk).
To farm, buy seeds then drag (click to pickup and then after to drop) from the invetory at the bottom of the screen to a farm plot (there is one outside the house, or you can buy and place another).
Buy shack/farm plans and drag onto the world in the same manner as the seeds, but the area beneath must be empty.
Materials can be added to a build site but attacking the site or dragging the resources from the inventory onto the site.
When all materials are gathered, attack the site in order to build it.
Crafting can be accessed by attacking the anvil outside the default house, then by clicking the recipe you want to use. If you have the required materials, it will be created.