Pocket Gamer: If you think about it, musicals are just martial arts films for pacifists. The only difference between dancing and having a kung-fu battle is that one involves smiling and moving your limbs harmlessly in time to violins and the other involves frowning and moving your limbs harmfully in time to violence.
Mad Acorn embodies this fundamental similarity. Not only is it about punching things, but it's about punching them in time to music as you romp from left to right across horizontally scrolling levels. The enemies are beats, and so you both dance to them and beat them.