Good, but needs improvement
I really liked your choice of instruments for the various parts. What programs did you use to make this file?
The bad news... I noticed a common melodic error which is also present in some of the other normal battle files on newgrounds that I have heard and whenever I hear it, it annoys me.
I'm wondering why you transposed this piece up from C# minor to D minor. Did you choose D minor arbitrarily?
If you had used a little more percussion and brought out the bass line just a bit more it would have been great. Your dynamics are very powerful. Especially the crescendos in just the right places.
I'll be more specific about that melodic error I mentioned earlier. It occurs in the sixth measure after the start of the part where the melody loops (I'm assuming you used around 181 beats per minute as the tempo, otherwise it might not be the sixth measure)-
the part where you put C, D, E, D, C, Bb, A
should have been C, D, E, D, C, E, A
It also occurs in the three other places where that part of the melody is repeated.