Thanks! This is the second time I've done a 1cc of this game. The first time was a 2019 NintendoAge contest.
For those having trouble, when dealing with multiple tough enemies, try to avoid getting between them. When an enemy is quickly coming at you, move the hell out of the way. You'll get the hang of the enemy patterns and when they're about to attack. Do your best to hold on to the armor and brass knuckles. You might also want to try holding on to the gun and save the bullets for when you need it, but I find that combat is a lot more difficult when carrying the gun.
Watch out for knife throwers when you don't have armor. They just walk along and turn around and chuck a knife right at you, and it does a ton of damage. They're not too hard to spot. Also watch out for motorcycles and grenade tossers. They're in the same places every time so just memorize when they're coming and the best path to avoid them. Jump kicking is a useful evasion tactic too.
The scuba divers in stage two always pop up behind you. You can see where they're going to appear so just be quick to turn around and punch, or use the backwards punch.
If you reach the second boss, just keep jump kicking him. The grenades he throws will always be instant death but armor protects against the gun.
If you somehow reach the third boss, just keep punching him as fast as you can. The goal is to knock him off the elevator. If you can make it that far when you're ready to deal with the rest of the game.