Yeah!
Impulse Tracker rocks! I use it all the time.
What you made here is very interesting. Good, original harmonies. It builds up very slow, but that fits the mood perfectly. As kingbastard already said, it's a grower.
I don't know if you're still active, but if you are, check out some of the things I made in IT and if you like it, contact me sometime. We may be able to provide each other some samples or even make a song together.
Anyway, 5/5.