Hey mate really nice idea... The animation over all is really good.. you have some nice camera cuts as a well.
The only thing I would work on a bit is his arms mostly from the elbows to the wrists. In some areas are bit stiff just something to look at.. try loosening the arms from the elbow down a bit more.
Also it would be nice to see the animation with a floor and a nice shadow. It would give the character some more presence, and I can see if your foot work is not slipping.... in a few areas his feet look like they slide in the wrong way a bit.
Just some suggestions
Really nice start great work..
Kurt
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