explain this aspect near the end?

[klyrner]

LOVE this game, played it like 7 times already and not close to sick of it. Even mastered that 3rd boss finally.. oof that was brutal first couple playthroughs. Amazing game and design.

Anyway, one thing I don't fully understand, is a new thing introduced in the last 25% of the game, where you go through a gate that takes you into the white orb world, and suddenly you now can warp straight to the white orb. And then the final puzzle of the game involves doing the same with the green orb, and even has a kind of paradox where you're inside one orb while at the same time carrying it... Can anyone explain what's going on here exactly? I get the gist of it and the outcome, but I'll be damned if i know how that works!

Especially at the end of the last section- when you get the last "drone", and go back to the area with the final gate-- why suddenly does that last platform take you there, instead of back to the green orb location, like the other ones were just doing? What changes?