Sounds like the kind of chord progression Joe Hisaishi would use to me (which are always beautiful); from that point of view, nice work with it! It's just that it's a bit short.
I like this piece. Both piano and cello are beautiful, but I missed a few more seconds.
Keep making this kind of music and make it longer!
Like it especially the cello, good job :)
Please contact me if you would like to use this in a project. We can discuss the details.