The platform tool is so much fun! Just a small advise; when raise a larger area, say a full room or a half room, it's easier to click the floor and raise the floor that is already there, than to add a platform box. When raising the existing floor less stuff will need fixing afterwards, you will only need to remove (or replace) stuff on walls that is touching floor (like doors and low windows). When raising half the room, it's quick to add the extra wall and remove it after the floor was raised.