Feedback!

Hello. I am a beginner composer, and I would like feedback on my 2nd piece ever! Any constructive criticism or information is welcome! This is meant to be a sort of duet between a cello and piano, and I wanted to switch keys as well! Please especially let me know if that was done fine.

https://flat.io/score/689b6ef0dfe979b398b2073a-piano-and-cello-assignment