Click the part you want and move it where you want it, then click. Press space to stop using a part so you can select a different one. Its best to add the back wall first, then the sides, then the front wall. I would then add the left roof then the right roof in sensible order, then see if I can fit the flat bit of roof in/ the brown rectange. It`s recommended to add two front and back walls next to eachother so the roof can fit on. Version 2 will have more features and part variety.
