Only thing that stuck out to me was the background string synth, the one that is quarter notes alternating between high and low in a 4 measure loop. When it switches to the higher notes (3rd measure) the tone seems to conflict with some of the other instruments in the mix; at some parts the piano synth, and in most parts the other (lower) string synth (playing a sustained whole note for 2 measures). I dont know if that was intended or not, but it didnt sound right, IMO. Maybe try finding a different note for it.
I dont know if you were looking for comments on the music side or not, but i might also note that the loop i referenced above looped the whole song without change. Maybe change it up a little bit for the verse or chorus?
The vocals sounded clear to me though, good job on that.