The kick itself looks p great man, the physics of the sandbag need work, you could do some little steps and throw in some punches and maybe try a sweep or something.
Thanks man, I can never get like rope/tentacle/bag like physics. Should be something I work on one day haha. Few punches sounds sweet but how would I animate a sweep? always wanted to try one.
tenks pretty much covered the movement aspect of things. So just a little nitpick, don't use a black base on top of the black part of your background gradient man.