So, the first minute solidly feels like 'die monster!' Boss preamble from Symphony of the night.
The rest feels like a nice mix between classic Doom/Doom II and Blood, till the 3-minute mark.
Felt like the main menu to this Castlevania doomy game, the last section nicely wraps it up. I would suggest looking into rerecording the bassline with an actual guitar, maybe experiment with a few styles from a chugging bass to cleaner slap bass? Also, try tracking down a better violin/string VST.
All in all, 4.5/5, not bad for something you made in 2010