This is actually pretty decent for an opening, and the arrangement is pretty well done, too. Although, I do have to point out that the part 00:39 got a tad empty because there is no bass, an the parts starting at 00:15 and 01:15 are very cool, but they are kind of cluttered (or maybe muddy), and the kick drums are kind of hard to hear. Anyways, I am pretty impressed by your arrangement and ideas for this track, and it sounds nice.