Good start mate...
At this point all I would say is speed it up a lot... Its little slow and make the main stem have a bit more pop snap in his movments.
The fast snappier movments will really help give him character and life.
Most of this can be done in the graph editor
I am enough of an artist to draw freely upon my imagination, knowledge is limited, imagination encircles the world. (Albert Einstein)
https://www.artstation.com/kurtb