Just double-click on the parts, kids, decor, furniture etc. and add them to the room above and drag around to arrange.
You can rightclick objects and bring them to the front or delete them if necessary. When you have finished your room, just click the "Save & Download" button.
Please note, that you need to wait until all the pictures are loaded before you can double-click objects. This can take some time, be patient
Create your haunted house