And how is this a remake of "Kung Fu Master"?  The sprites look like they were lifted straight out of Vigilante.  
But Kung Fu Master.  Now, there's a classic.  According to Wikipedia, KFM was supposedly the very first beat-em up, but I'm trying to think if there were any others before that.  I thought of Mechner's Karateka, but they were both released in 84.  Hmmm...