Review :)
It was good. It's really dark (as you said xD), but I think it's too long. I think it would be enough only 2 minutes, because it becomes monotone. BTW, you should change a little in the beat. Percussion beat is OK, but you need to delete the drum from it. It's not bad at all, it's good, but "Tree of Life" is better. :)
Keep it up! And please, check my another stuffs too. :P