my recommendation is to try alternating melodies. it's not the easiest to do but it helps bring more life! you could add a few synths with the same notes in the background to fill the song more, however, you have to be careful on how you implement that because you don't want to make the song muddy. apart from that, I LOVE IT!!!!!
i agree with
@althruist
on the reccomendation. it would definitely bring the music more lively. n i looove the vocal chops u put in as well. n i love how creative u got with this.