Do you have any improvements for my composition?

A friend of mine wanted to participate in a game jam. He asked me to write a boss theme for him. The theme was "A battle against a loyal comrade, who has been turned against you by an evil force."

I wanted to know, purely from a harmonic perspective, whether I could keep it that way. And whether the instruments were mixed well and weren't "too loud" or anything. Feel free to share your thoughts; I'm open to constructive criticism.

And maybe think of a name, I'm very bad at that, I rarely make electronic music.