Good characters designs, backgrounds, animation and voice acting.
But,
You really have to work on timing your scenes and the timing of the dialogue and lip sync.
Each scene or camera angle was about 1-2 seconds long.
It was making me dizzy and cross eyed trying to follow everything.
It was hard to tell where the characters were in the scene and where they fit tin the background.
It also looked like you used the same split second scene repeatedly to add more time or length to your animated short.
The story was confusing and hard to follow.
When your making a story you have to constantly ask the question "why?"
Why do the characters act or think the way they do?
Why are they stealing from each other and for what purpose?
Where do they live and why do they live there?
Why do they fight, train, and live the way they do?
My advice is....
1.Your entire short was "quick cut" and "zoom" camera angles.
Have less "quick cuts" and have longer timed scenes. Maybe 5 to 10 seconds long.
Its up to you
and the length of the scenes should be judged by whats happening in the story.
2. With some of the lip sync, i noticed that dialogue timing was off by at least 1 second or half a
second and i noticed some "shuttering" with the main character's lip sync.
3. Work on your humor and jokes. They were cliche and under developed.
This has great potential if you fix what I had stated above.