Let me second Xanous' point that the zoom effect can be used for transportation. This is something that Robert Waggoner advised in his "Lucid Dreaming: Gateway to the Inner Self" book, and it really works great.

I have experienced a highly pixelated dream! I became lucid when my wife's Dream Character announced that I would be entering a lucid dream and that it would look super pixelated. So in a way it was her idea, not mine. The effect was very cool, though! This was the dream: The Lucidity Machine - Dream Journals - Lucid Dreaming - Dream Views

The other ideas sound like a lot of fun. I'm not sure that I'd enjoy upside-down too much, but anything's worth trying once. Good luck, and let us know how your experiments go!