Pretty good, but room for improvement.

So there's four shots in this super short animation. The close-up of the eyes, the close-up of the face which transitions with the first, then after the punch from the side, and finally after the punch head-on. It strikes me as a little anticlimactic that we skip from the 2nd shot to the 3rd - you never actually get to see the punch, or even what was being punched. The third shot also has these weird wave effects, and the slow pace they move at feels a little awkward, including the big wave which is used to transition to the fourth shot. The fourth shot has the slight breathing animation but would probably look a bit better if the movement were LESS smooth. Think of heavy, ragged breathing. It's not a consistent in-out kind of motion, but rather tends to happen in short heaves.

Add in the actual punch and clean up the 3rd shot a little and you'll have something that looks way nicer. Also, even if this is only a proof of concept, sound effects would have made this a lot more impactful as well. The angles are so cinematic that it almost feels criminal not to have some audio to go along with it.

As to what was done right... The graphics themselves look phenomenal. And not just the linework, but also the color choice, with everything being in different shades of blue. Very captivating to the eye.