I immediately had to think about "Mike Oldfield" somehow... XD

This piece evokes quite a good feeling and atmosphere. The style is quite consistent and plays along nicely.

Just two suggestions:

1.) The main theme (main voices) can't be really heard quite well... I hear some synth-flutes and a... midi-piano?! The main melody sounds too "background-ish"... give it more dominance!!! ^^ (for the next time)

2.) Though this song playes nicely along... it sounds too similar in all parts. Add some interludes, changes and breaks, maybe. Just like 3:39... this is a VERY welcome break of your usual pattern.

I can understand that... we sometimes loose ourselves in a pattern, which is very sweet and cool. But the part 3:39-4:18 is a very welcome change in your pattern. And the next style sections are pretty good (with less percussion than before for a short time)!

This is what I'm talkling about:

More changes and diversities!

^___^

Addition:

The aspect "more changes and diversities" only applies for a certain type of music genre. After all, this is an IDEAL song for RPGs or strategy games, such as "C&C" or "STARCRAFT" - these games usually have looping songs, which play all over and over again.

But this was just a suggestion for you to grow and expand. ^^

If you want to try something more than "looping scores", I would try more complex compositions. If not.... okay, too. :D

After all, there are countless people who are great at "looping songs" and try are pretty happy about it, too. It's just a matter of taste... AND for which cause you're composing your songs.