As promised here's a gameplay video.
(is there a way to embed youtube here?)
Obviously a lot of things are still missing/unpolished. A lot of animations are missing or placeholder. The building experience still needs work.
But this should give an idea of the way you go about building stuff in the game. The controls are currently either keyboard or controller (I've tested with 360 and PS3). I'd like to add mouse *and* keyboard. For example wsad to move and then the mouse to choose where to place things. I'd also like to extend the control scheme on controller to be dual stick, left to move, right to point where to place.
The video is quite long so here are some GIFs demonstrating the key points.
Cutting down trees and placing floor boards down:
Building walls and using scaffold to reach and build the roof:
Placing lights. This also demonstrates how the walls fade away when they're obscuring the player: