It's a good thing she has no desire to rule the world, ne?
If they really were walking upside down, would they really know because their eyes are upside down to, and so is everything else, so it would seem normal to them.
Wish I had a room like that...
Kibby: Um... Well.. KUBBY! THEY'RE ON TO US! RUN!!!
Actually, the whole room is Upside down, either that, or the Camera is upside down