Very cool entry. Love your work on the piano.
Track 1 (Prelude): The Prelude felt like the cello could use some confidence. But all around solid. Digg the live played drumm ^^.
Track 2 (Aurora Glaciers): Wonderfull description of an adveture ahead. Love it!
Track 3 (At All Costs): Can't overhear some influence from "Merry Christmas Mr. Lawrence", wich is a great song. Very good. Though the cello feels a bit out of sync. Maybe just a programming problem, since most string lybraries need some time ahead, wich can be compensated in your DAW.
Track 4 (The Final Journey): The flute melody is wonderfully done. Somehow got some Journey vibes going. But also Ocarina of Time :D. But defenetly my favorit.
Overall a very beautifull contribution you should defenetly proud for!