This is an unusual mod, with the brand new mechanic. The most part of game you will not be able to touch anything: you'll have to interact with boxes, energy balls etc. using your portals only.
Demo version release soon. I know, i promissed you to finish this mod, but it is not ready yet.
I'm so sorry... I don't finished mod yet. I got a lot of work to do, so i had no time for modding or mapping.
Here is some gameplay videos (also demonstration of zero-gravity switch).
Now i'm working on gravity direction. In the third part of the game, player can change gravity direction, turn on a slow mode, or zero-gravity mode...