What a fun little experience, I do agree with you that the art and the music is a BANGER. I am curious which programs you used for your art and music, because it looks like a nice variety, and it must have been a rush to get through it all in time. I liked the reveal of the even stronger enemy, and the "I will not give" trope as you kept regaining your health, that was fun. One thing I would say (because I'm an idiot) is that when the opening text began, I walked all the way to the right and crashed, because I didn't understand the chicken in front was the last boss, I has thought they were the narrator of the text.
Overall, great stuff!