I'm not sure I know enough music theory to figure out what's going on with those melodies. They sound cool, though. It kinda gives off a feeling of getting your bearings in an unfamiliar dimension where no dangers have presented themselves (I'd say the vocal samples support this interpretation), so maybe the Phrygian mode is involved somehow, but at the same time there's definite excitement? I don't know. Whatever it is, I think it sounds cool.
Also, the ending kinda reminds me of some of ELEPS' stuff, like "Black and White" and "Shards of Power", which have roughly the same style of ending.