I think it looks great, but there are two weird places.
1: The right arm looks deformed. I recommend changing it so that it is held in a boxer's stance while jabbing. You could reference Muhammad Ali because he had a tendency to keep his hands at his side as opposed to his face.
2: The left leg should not buckle in during the punch. It should bend in the other direction somewhat.
Aside from these two criticisms, I think it is awesome!
1: The right arm looks deformed. I recommend changing it so that it is held in a boxer's stance while jabbing. You could reference Muhammad Ali because he had a tendency to keep his hands at his side as opposed to his face.
2: The left leg should not buckle in during the punch. It should bend in the other direction somewhat.
Aside from these two criticisms, I think it is awesome!