I like a lot the composition, and instrumentation, despite being a short piece it feels complete.
The transitions between the different parts are smooth, and good overall mix.
The comp/limiter (I'm guessing) feels a bit too aggressive on the lows.
I like that roll and "rallentando" at the end, but I think the final hit fall short after the tension and epic vibe of this piece, but it's not a big deal. Solid work.