I liked the intro, it was pretty calm, but it let you know that there was going to be some energy in the song. Your "scream" sounded a little bit like you whispered it but it did it's job well enough. . .
It seemed like the whole song was just a little bit lighter than you might have intended, as far as getting a "heavier" sound my only advice would be to add a compresser to the bass you want so you can amplify it a bit more, or maybe you just need a better synthesizer, I can recommend some good ones if you want.
The drums weren't too bad overall and helped build some energy to the song.
I liked some of the panning you had with them it was really nice
The song overall was pretty repetitive, but you added a fair amount of effects and drops and calm parts, so you kept it pretty interesting.
The guitars reminded me a bit of doom at time, which is awesome, doom had a great soundtrack! :P
Overall not too bad, a little repetitive but I liked the song overall. . .
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