How to build a pixel world?

subprime from beeple on Vimeo.

Rita from media art sent me this interesting video named "subprime".All the elements in this film are geometry objects.I'm really fascinated by this kind of "pixel style" so I decide to find out how designer made this. Hence,I made this scene.It's unfinished but the style is similar.Now it just have couple of trees,a bed,walls,and floor.I plan to finish it tomorrow.It tooks me whole day to figure out how to add sky light and environment in this scene.I'm exhausted today...hope I can finish this tomorrow.Cross my fingers:)