Easy bruv, good song! Few remarks:
as said, the videogame sample. Don't know whether i'm feeling it or not. Thing you could try is this: try to stretch it out, or cut it and set them apart, pr any other way that you can make it longer, or even use another sample. Someone above (too lazy to scroll for username) said it put him off. Well, you could maybe use that! Your song is uptempo, so is the sample. Up tempo breaks + slower videogame bleeps = more contrast = bigger drop? Try some shit out!
Second: Your vocal samples (out of curiousity, are they all from the sixth sense?) in the beginning blend in a bit too much with the other sounds: bit incomprehensible. Most dark songs have clear vocals, so you can get creeped out by what they're saying if your raving the shit outta yourself and taken too many pills. Gotta adjust the levels a bit to make the vocals pop out a bit more?
Third: the title. Change it mate
Do not ever attempt a darker song and have 666 in the title. If you'd have 'The Number Of Your Child' it sounds way darker like Auschwitz kind of shit instead of wannabe metalhead kids that carve 666 in everything they see, lol
Keep it up mate, i'm seeing wicked progress in you.
cheers