As he replied, it's tremisabdoul which made the music to fit totally the ideas I had, and he did it perfectly so the music progresses as well as the time/weather !
I did the pixel art (except for the background) and that's the first time I did it, I wanted to see what I could do !
Indeed, it feels less polished as it really is, I will try to learn how to do it better for the next jam, thank you for your comment !