Good remake....
But there's a flaws. Well, the game is insainly difficult on Easy mode. So maybe do the following:
-On Easy, maybe have the superbar not decrease to 0 when a life is loss. And also make the enemies do less damage.
-On Medium, have the life bar drain the same way as now, but don't reset the superbar on a life lose.
-On Hard, have it the same way as you have Easy now. And for the Hard you have right now, call it Hardcore difficulty.
I know you're trying to get the same feel as the original "Kung Fu", but this version seems harder than the original itself.
BTW to the people who are wondering how to do supers, you must beat a level first to get a super.