Great work here! A great beat em' up experience that didn't outstay its welcome. I liked the variety between gun, knife, and fist enemies. I also liked figuring out the two bosses (though I found it a lil tricky to dodge the kick attack on the second one).
I encounter a couple weird control soft locks from inputting two many jumps in a row (I think?). I can't tell if you are buffering inputs and the buffer is too long, or if you aren't and its doing some sort of weird interpretation, but I found jumping pretty unreliable in general. I also found I frequently was getting double punches and weird stuff like that. Fine for this length of game, but for something longer, more polish would be appreciated.
I really appreciated the permissive continue system. If I had to restart when I died midway through stage 2, I would have stopped.