The tone of the soft pad combined with the foley in the background really makes it for me.
Really minimalist instrumentation, but I think this doesn't really need anything more. But If you were to extend this to be longer, I felt that you could have another instrument to play instead of the cello sometimes, since the raspy/nasally Sul Pont sound got a bit grating to listen to after a while near the end (just how i felt, so subjective take).
Great work!