Feels like something is missing, but thats okay!
I loved the beat of it, I enjoyed that. Unfortunately though, I couldn't help but consider until 1:12 to be nothing more than a drawn out intro, as it got worn out to fast, it needs to be mixed up. 1:12 is where it got really good and got me somewhat excited...until it kinda faded out at 1:40 again. That part I'm fine with.
If I were to suggest a solution in my tastes, I'd use more of the chunk between 1:12 and 1:40, and if you were to keep the rest, add some sort of melody to keep it not so shallow. When I was listening to it, I couldn't help but think really fast paced piano (or something of the like) would add a lot of flavor to it.
Its a nice job, but it feels nothing more than a base for something that could be more epic (especially since its titled Boss Battle). Keep it up though!
Napple napple napla
Please contact me if you would like to use this in a project. We can discuss the details.