Yeah, I can definitely agree with those criticisms. Unfortunately due to time constraints we weren't able to flesh out the fighter behavior and game loop as much as we'd hoped; ideally, they would have been a bit more aggressive, had more varied movesets (ducking, jumping, dashing, knockback, knockouts, and recoveries were all on the table at one point), and had some more personality. Your idea about fighting with other parts of the body (e.g. kicking) would have also been pretty cool!
We did consider working in penalties, too -- in that case, the referee would be removing from a fighter's score. It just became a bit of a control scheme nightmare and we abandoned that idea in favor of a minimum viable product. If we'd had more time to think about implementation, that would have been another great way to extend the game's mechanics!
As for the build situation -- yeah, that would have been the move. I was scrambling to get builds together in the last few minutes and this was my first time trying to support multiple operating systems. MacOS was especially tricky since it packaged it up as a folder with ".app" at the end of the name which I can't really upload. I guess the standard solution is some external application from itch, but I didn't think I had the time to try to set that up. Anyway, lesson learned for next time :)
Thanks for the constructive comments and thanks for taking the time to play!