I would first go back to the fundamentals in your case, because I see you struggle also with the shapes and anatomy. You also repeat a lot the same pose, like X standing shape for all your characters. You could add some dynamism by changing these postures and guide the eye to the next frame.

I also see that you don t work on the backgrounds almost in any frame. Try to put these things together and I am sure that toy will have a great improvement =)