I promised myself - and the author - to write some remarks about this game. It seems to be sometimes luck-based, but I admit that there are combinations of punches that can make you win with KO even within the first round. I spent few hours on this and it is possible to develop a strategy. Ok, here go the thoughts:
1. Being able to move forward only by throwing punches is a very bad idea. I mean yes, during the fight the boxers are moving forward pretending punches, but many times it leads to an absurd, for example my opponent is stunned, right? Obviously I want to finish him off, but my boxer just fails to move forward to get in range of any punch. Instead just moves back and forth no matter which keys I press.
It would be much better if you applied a scheme like - moving forwards/backwards - arrow keys, all actions - z, x, c - punches, s - guard.
Your boxing simulator was much better in this matter.
2. Speaking about the guard - here is something I consider luck-based: my opponent breaks my guard much more often than I can break his.
3. Not enough punches and some not effective. Do you think that hits on the torso do not do any damage? That land on the belly for example? Where is the famous finishing punch on the liver? In your scheme it could be down-arrow, in the one I proposed - d or v, seem equally convenient.
4. One thing is extremely illogical: the cash rewards. I mean come on, you get the same cash for beating a punk in some gym or club as you get for fighting with Anthony Joshua, Deontay Wilder etc.? The bigger the fight - the bigger the prize. And if the manager is taking all the cash - I would sack him and beat him up. Or maybe I should beat him up first?
5. Another inconsistency - during the fight. I got full health, chin fully upgraded, had not been knocked down even once during the current fight, but the opponent can hit me with that flash punch so hard that I cannot get up, because tapping space is barely having any effect?
6. Yet another inconsistency: after any of the boxers survives being knocked down regains some health, but the other boxer's health remains the same. I mean both sides are taking some rest during those nearly 10 seconds, right?
7. A bug: between the rounds and even during the fight opponents health sometimes exceeds the full bar much to the left of it.
8. Did you apply the "3 knockdown rule"? I noticed that sometimes the opponent can be even knocked down 4-5 times and the referee is still not ending the fight.
9. A suggestion: for the situation when the player already knows that will lose the fight you could add a "throw towel" feature to prevent your fighter form receiving a massive KO.
I like the added feature that decreases your health/power as you are getting older. Even Klitschko could not be the champion forever.
Oh, I noticed the obvious Macho Man reference :-)