Hm... Not my style, but very well done for it's type. Horror-style was something I got into when I was younger, so I know a bit about it. I could never make it, myself, so I have respect for people that write it successfully like this.
The mixing/mastering is VERY on point. I couldn't hear a single thing wrong in that regard.
The chorus felt kind of repetitive; but again, that kind of works in this genre. I like what you did with the layering on your voice after dropping the pitch on one track. It has that sinister vibe to it. I've used that trick myself once, actually. Over on my track "Inner Conflict". My inner demons have that voice.
Your gangsta-rap style verse flowed beautifully dude. It felt recognizeable as GR, but unique enough to not feel cliche. This definitely deserves the recognition it's receiving.
~DJDj