A decent attempt at the 'Double Dragon' style which some strong character work and animations. Hitboxes seemed responsive and controls were tight, slight acceleration and deceleration in movement made moving around feel really good and allowed some interesting maneuvers when playing.
That being said, there is room for improvement. Your character art and environment had some drastic differences in art style. On the whole it isn't particularly a problem, but in the future your artists should try to keep their art work consistent with one another. Player feedback is important within games in general, but games like this definitely need it and whilst you did have it with the enemy reeling back, it was hard to tell whether or not I would get hit by a players attack. Next, I would consider your collision boxes as it made it hard for both the enemy and I to navigate the environment when other characters are in play. I was able to get enemies to line up and do an attack and move back and forward to avoid damage, leading to fairly repetitive and simplistic gameplay. Finally, is there any difference between the two attacks because it was hard to tell what the difference was. Maybe it would have been better to have just one attack and maybe a parry or block instead?
On the whole, the game has the foundations of a side-scrolling beat-em-up but could use some work and improvements here and there. Given the timeframe you had, expecting a full game and extremely high amounts of quality and polish is definitely out of scope, but polish goes a long way into the feel of the game. Good effort.