Spend more time in your music!
This was actually melodically pretty good, but when you make music you really need to put down a lot more effort. The beginning was great but honestly I couldn't stand 01:12, it sounded annoying as hell. The beat was not nice, I actually recognized the samples you used. >.< The sound was destroyed at many points throughout the song. You can avoid this by keeping the peak meter below zero. Another suggestion would be not to use FL Slayer at all because it sucks. (unless you're good enough to fix it)
2/10
I Hope I'm not sounding harsh. Just practise more, put down some effort and it'll eventually get A LOT better. :)
- Xtas