I don't if it was intended, but the bass is so loud at the start that it's peaking.
Peaking is basically when the computer cannot register the loudness of the thing, so it ''scratches'' the sound, a bit like a distortion. The rest of the song doesn't peak though.
2:39 ; Could use a better transition
1:37 ; Could use a delay with the synth (an echo, just like this one 1:55) [in my opinion]
Just one question, did you use samples for this song? How much, if this isn't asking too much. :3