The artstyle is pretty bad color wise, expression wise.
the famliy guy-esque eye shapes dont give alot of expression to the character, all the work is done by the eyebrows and eyelids and they dont get the job done alone. Try to do a better job at drawing eye shapes and change them up with different expressions.
Some figure practice or any drawing practice in general will help you out a bunch, your line work is awful looking at the head shapes, the stiffness on the hair , perspective on the the table , and other various shapes lack any refinement. So just draw alot and try to improve
As for the color choices: they dont work together. Your choices are sometimes too saturated. I think the over saturation is the biggest problem, but im not 100% on color theory stuff, regardless you should study some of Ego's color choices when it came to backgrounds and such.
The character animations are kinda stiff, try giving them some frames to slow down before they come to a complete stop
I think you deserve some praise on Dan's hand movements at 0:25. They were a nice touch
anyway, hope you improve