The attack feels very low-energy, and the way the character draws their arm back looks painful. Have the body rotate into the wind-up (away from the viewer), and then rotate into the attack (toward the viewer; as it currently does). The motion will also feel more natural and energetic if the body leans back with the wind-up and forward with the attack.
These kinds of rotations and leans are easier to plan if you roughly block the figure in for each frame, instead of moving parts of a still sprite around. Moving parts around is good for after you already have a sketch and know which parts would be reusable and where.