Days
My knowledge on this style of music isn't quite my forte. Overall I think this song is awesome and definitely well-done. I think this would fit perfectly as background music for a plethora of games.
A couple of points I would suggest tweaking:
Mainly, I feel that the instrument introduced at 0:11 (sounds bell-like) that carries on through the remainder of the song ought to have some sort of variation - whether it is tweaking the pitch or having the hits change every so often. My reason is because it is rather repetitive, and I think takes away from the replay value of the song.
Following the percussion fill (at 2:24) I think you should highlight the percussion a little more by increasing their volumes and have it as if someone was essentially playing a solo. This is the climax of your song, so I think it might improve it with some additional energy.
If I were you, I would play around with the concept of introducing additional instruments, whether it is another of the main melody harmonizing with it, or simply some background chords from whatever. I think this would add sort of an interesting orchestral sound to it. It might sound better - might not.
Great job on this song. I look forward to hearing your future submissions.