Nice work! I love how you managed to complete challenge B, and I really like your choice of instruments. It was nice to read about your process making the music as well, and it’s always interesting to see someone making use of sheet music.
There are lots of great musical ideas in there, however if I could offer some advice I’d say that it might be better to slow down a little bit - introduce a new idea, then maybe repeat it or build on it before moving onto the next one. Obviously this is only my personal preference though.
Well done on a great first submission :)