(Disclaimer: I'm listening on a laptop right now so take that into consideration)
I liked the energy and drive of the track. Works for a boss fight. To my ears, on this set up, I felt there could be a bit more bass (both in frequencies and in bass guitar itself) in the mix. It lacked depth on the lower end. But that might be these laptop speakers as well. Assuming this is for a video game, does it loop well? I did think you could have come up with another section for a bit more diversity but perhaps the client only had budget (or bandwidth) for a certain amount of music.
Thanks for sharing.