Great job!
It first sounds like a GREAT boss theme.
And then you hear the "A Link to the Past dark world theme"
If you make the first partt longer, then it would be a perfect boss tune.
And this would be perfect for a nintendo trailer, first some "flashes" in the beginning, and when the actual theme starts some previeuws with the titel slowly emerging from the screenies :D
people would be in awe :D