Ben Zingo:

to push things to the next level, try adding more acting decisions- leaning forward or backward, hand movement, use the ears for expression, etc.
especially towards the end, it just feels like two static images moving their mouths

Liam Smith:

You have a clipping issue with the right character's feet

DarrenT:

I really like the character designs here. Just watching them makes me smile.
I think it'd useful to work on adding more movement to emphasize what each character is saying
Finally, watch out for the flickering leg on the blue bunny. Small things like this can catch the eye.