The polish on this game is impressive! Probably due to the wonderful art, animations, and music (the ending theme reminds me of Mario & Luigi Superstar Saga, of all things). And I think the overall concept was a great choice for "roles reversed".
My only nitpick is that there's no way to win or keep score. I know that's kind of the whole point, but even something simple like a counter that shows how many times you've been pummeled by the hero would deepen the gameplay a lot, letting players try to beat their own personal record. As it stands, you can sit there without pressing any buttons and still get the same ending (unless there's some secret ending I never saw for getting a flawless run).
Overall, great job, I really enjoyed playing!