Just a few minor things I would improve if I could.
1. New Sprites for Miguel and his mom (Pictured below)
2. Change "Fucking Hammer" to "Swinging Shank" and maybe replace the "hammer" with a shank (Also pictured below)
3. Change the "Game Over" text to say, "Dead Meat" and take away the Game Over music
4: Change "Catch the Damn Flies" to "Shit Fly Catch"
5. Change the text that appears before a 2 player match from:
"One on one
"Put him in
a body bag!"
6. There is one spot in the "Miyagi Dojo" Level, after the second "tower" I believe, when you're jumping across the water, where you have to jump on a single block, and then make a very difficult jump, 2 spaces over, to another block, as the wind pushes you back and as enemies and birds and chop sticks are flying at you. That is by far the hardest part of the game. Maybe that could be changed?
7. Also, if possible, it would be great to take away the collisions that happen between characters.
Just some suggestions.
The sprite improvements: