I love beat 'em ups! That's why I developed one as well for the competition :-D
The old arcade feeling is nice and the animation are nice as well, the walking of player and enemies are really cool.
The game has not much variety aside for the background but I totally understand since I have found very difficult as well to do a complete beat 'em up game. I would have loved to see enemies more challenging, I have finished the game easily at the first play and they attacked me just a couple of time when I was distracted by my wife that was talking to me.
Please let me know if you think to keep developing the game, I would be happy to play more and see what you can do with more time :-)