Yea, so this is a bit creepy. Not for listening to in the dark >:D.
I turned off the lights so it was dark
There were vampires EVERYWHERE!!!
They said "We are official Darkulas. Vampires who only exist in the dark. It's a rare condition."
So this song is pretty awesome except for the darkulas but they have no business with your song. Or do they?
Oh, they were hiding in my box of Count Chocula©, and I banished them to this song. Sorry about that, pal!
Familiar...
I coulda sworn I've heard this song before.
But unlike your Octopus cover I can't put my finger on it.
This song is still awesomely done however.
I have to admit, it sounds sort of similar to the Halloween theme at the beginning but the rest, I don't know what you're hearing.
Please contact me if you would like to use this in a project. We can discuss the details.
Smidly 
