Needs better sound quality
Well, it's very hard to review this because of the sound quality. Just everything was hard to make out. The beat and the vocals.
But let's start from the beginning. You should edit out the first few seconds as there can be nothing heard except for some nasty static sounds. It's okay if there are a few seconds of silence before the song starts, but those cracking noises are just annoying.
Then, everything needs to be louder or even better recorded at a better quality. Everything sounds as if you had put the mic underneath a cussion or something.
The rapping itself could also use some improvements. You should try to time the verses better with the background beat and you should try to time the lines better with your breathing. Sometimes you had some pauses to catch some breath, but they didn't really fit there where you had them.
Also on one occasion it sounded as if you forgot the text and just mumbled something to cover that up.
I'm sorry that I can't be more positive about that track, but as I've said in the beginning, it's hard to review it because of the low sound quality.