I started listening to it, then got really, really, confused. About ten seconds later, I realized it was in 3/4 time and it made a whole crapload more sense.
It runs pretty smoothly. It seems like whenever it loops, the volume diminishes slightly, but that might just be how Cubase works (I think that's what you said you use).
Whoa. So, I was in the middle of typing this review, when the song finished downloading onto my computer and started playing. THE ONE ON NEWGROUNDS AND THE ONE ON MY ITUNES PLAYING SEPARATELY SOUNDED ABSOLUTELY FANTASTIC TOGETHER. You should try playing two at the same time. You might have to edit them slightly to get the right sound, but I assure you, once you get it, they will go beautifully together. And you will want to make another song based on that.
Anyways, the instruments you used combined with the melodies create a really creepy, ominous atmosphere.
I can't continue with this review. I'm just listening to how good it sounds on loop in two different places. It's mind-bogglingly amazing. I'm moving this up to five stars just for its double-loop-ability. Wow.
I'm almost sure that that wasn't what you were going for, but I can't really comment on anything else about the song without it looking boring. Your song looping in two different apps is amazing. Great job.