Woah, this is awesome. I love that intro with new instruments coming in one by one like that.
The kick which comes in at 00:40 could be turned up a little bit because it's kinda quiet (imo).
You also have the same melody throughout the whole song, which isn't necessarily a bad thing to have, but it would be cool to see some changes in the melody and chords in the second half of the song, because it does get kinda repetitive.
Another thing, imo, an extra ten seconds to wind it down wouldn't hurt, or to maybe offer the ending a little more finality.
But yeah, this song is sick and I love the instruments and the overall vibe. Good luck in the contest! :]