Here are some pointers on what you could work on for next time:
In many places, there doesn’t seem to be convincing “weight”. In particular, the footsteps didn’t seem to exhert any force upon the ground… they just floated near it
When the red boy falls down, he recovers a bit too quickly IMO
The hand which comes to pull the bully moves a bit too slowly. It’s pose also seems a bit quirky…