There is a chair now, and you can stand on it

StackUp has a chair. It is a chair because somebody needed a chair, and it is grey, because everything here is grey.

You can pick it up, carry it, set it down where you want it and stand on it. From up there the top row is suddenly within reach, which is either good planning or the second to last decision of the round. The chair is furniture and never counts as part of the tower, so nothing you do with it is technically building.

The tower has no opinion on any of this. It comes down on its own schedule.