I really like the composition on this!
I'm kind of curious how you pictured the final bossfight, it seemed like it was in a major key and uplifting, which is rare and interesting!
If there's one piece of feedback I could give is maybe an adjustment of drums... the kit felt a little off at times, maybe not as epic as the rest of the orchestra? Maybe a more orchestral drumkit, or some layering of drums with reverb could help.
All in all great job, this was a lot of nicely composed tracks for such a short period of time!