The result look pretty nice imo, it's a solid work, well I didn't understand anything about the story but the atmosphere was ok and the big ideas were easy to get (the ancient and new world, the end of the world, the importance of the flower...) so everything's cool!
On a more technical side, I think your biggest problem wasn't because of you but more because of your choice of music. I usually don't blame about the music, but since it's a competition we're talking about, I think you needed at least two parts like the last one, the music itself has a lack of power, we're waiting for something to happen and when it finally happens it's really short. But, that's not the only issue and here I'm talking about PBE's last track, I told you already but you should have used an effet like a fast flow of scenes with a cookie cutter or a twitch or whatever. Maybe with a stronger pace you could have arrived at the same result but as it is now, the part really lacked in rythm to me, it should have been more explosive, as a great and unexpected finale!! Ok xD
Otherwise, about the HUD, it's good to make them look really clean and HD but the point is to fit the other sources and here I think you should have lowered the quality of the effects or rather blurred them sometimes. But it's a detail. And yeah I know some of those opening sources are coming from my personal collection but since they weren't all in perfect quality, it could have been cleaned up a little bit (and pale cocoon scenes especially).
But yeah, in the end, the editing was good, the concept was interesting and made the transitions between the parts really look natural, to me the change in colors didn't shock at all since I've got what you meant by it (and the transition was well done anyways). So yeah, just the problem that there's no real conclusion in term of rythm, otherwise I really liked it! Good job to both of you and good luck!