Get some plugins man :U
Slayer kills the ears, and when I first heard this I really liked it minus the slayer. Now that I've used FL Studio a whooole lot, it all seems the same to me. It's boring because I hear all these sounds all day when I make my songs. You should use more effects on different channels in the mixer, too, but seeing as this is old and it's good even then, I'm giving you an 8 and a 5/5 so that you may just one day re-do this.. And I look forward to that.