Wow what gorgeous and stylized art! The background music was also stellar and went well with the art style. The punching sound effect was a bit too loud for me, so being able to adjust that would've been nice. Also, I had to look at the game page to know F was punch, so having directions displayed somewhere, even just briefly on the screen, would've been useful! I think the jumping could be higher (which was a critique for my game too, haha) in order to make the game a little less difficult. Wonderful work overall :)
Also! You probably already know this, but uploading your game to be web-playable (which should be doable with Unity, last I knew) would be a strong choice for more engagement. Regardless, the game size was small, so downloading it was no big deal.