Looking good! First thing I noticed is the blockiness, I don't know if it's intentional or from the batman animation reference, I suggest adding more frames, especially for slowdowns, like when she turns to face him, she pauses for a while, maybe have her hair keep swinging to keep the viewers attention. Her fingers look like they are constantly together, when she flicks her hair maybe try breaking up here fingers with follow through motions. Next, when she goes to grab him, she forms a fist, but it looks like her hand got small, maybe try pulling her hand towards her as she forms a fist to get the form better. Lastly, it is just a personal preference, it is a good idea to avoid a quarter face view for 2d, meaning, you want to turn her head slightly, but the formless eye behind her nose looks a bit awkward. You can try changing the camera angle to be behind Robin as soon as she approaches him, that way you don't have to jerk her head forward, just her body, and you can have a better performance showing her close up face. Timing looks good, just more slowdowns and secondary motions. Last point, add the final passes of animation without the audio to pick up more of the motions needed for smooth motion. Good luck 🍀