Hi,
Do you have an idea of the game style it should be on? I think that the backing part sounds like bossy or fighting enough. I mean drums, bass and the overall feel and chord progressions.
I would concentrate on the melody instrument next. The melody is a bit non-directional and jumps over here and there. Sound like it's just improvised and left like that. Just dissect it down and create some more memorable themes from the part you like the most.
You're on a good start!
-Lassi
Thanks for the feedback, I'm keeping the chorus as it is, and I'm also NOT making this the final boss theme. This will possibly be the boss theme or a theme in some other part in a game.
I'm working on a new final boss theme, it sounds more similar to your reply and how it should sound.
This is an extremely early preview: https://clyp.it/mk3sf4cd
The starting will be changed, I have yet to create a chorus, but it's sounding good so far. The middle after the verse is just a placement, it probably won't be there in the final theme on 0:47.