It was alright I suppose.
To be honest I thought it would be better, though it's not terrible, it is good, just not 'great'. Some things didn't add up. When the two people were fighting the ground was a tan-ish white, then when it zoomed out from spectators point of view, the ground was a greenish tint and detail seemed to be on the ground at this point.
The music was amazing, but I did notice hardly if many sound effects. Like for instance, when the trident was flying through the air, it could have made a wind sound, though not loud to bring the attention completely to that sound, but enough to let the view know it's gliding through the air. I would also like to hear some clash effects when the sword hits the trident or the trident hits the shield.
Although artwork was good, and I don't expect it better (Not saying you couldn't do better just saying it's not necessarily.), but some movements were choppy, maybe they were meant that way, I'm not sure. Anyways an example of this choppy movement might be a part or two of the various fighting moments, but one for sure is when the emperor, king, or whatever you call him moves from his chair to the railing.
One last thing, why did the emperor person make a weird face, stick his tongue out, and go crazy? The seriousness of the fight and the relaxed comedy trying to be played at that moment gave me confusion. Didn't know whether to laugh or be disappointed (Probably just my thoughts.), but I didn't laugh, seemed like a bit of childish humor. Not for me.
End the end though I gave you 7/10 because the music was great, animation was choppy at points, and there was little to no sound effects. Wasn't terrible though. Good job! Hope to see more!