The idea behind this is to make an episodic mod, which you can play as it grows and every new chapter will be based on a whole new theme. The basic concept is the following: You start at the main room. Use the portal machines to visit the chambers and gather all the eye balls. Bring them to the main room and open the gate leading to the next chapter.
The puzzles are "interesting" sorta of. Chapter 1 and 2 I have no qualms with, because even tho it is abstract in nature it makes sense because it is simulations. Chapter 3 for some reason just bothers me, a WHOLE new mechanic that is central to completing all the stages? No thanks.
Just didn't get my head around the whole new concept. Also this has no story, even if you keep putting "the story continues" on it.