words

I had fun singing to it.

Pretty good

Pretty good, keep doing this style. This could be used for anything, fight scene, chiller scene, anything scary.
Reminds me of Doom and Pico's School at the same time, (That was a compliment ;) )

Too repititive for a metal instrumental

If it had words it would make sense, but as an instrumental some parts are too repetitive. But other than that, it's pretty damn awesome. Good job. it really made up for it at 2:00.
Really, it just needs some more guitar solo, that's all. Repetition doesn't exist during a melody.