This is quite good!
Your string writing is nice, but I think the score is in desperate need of phrasing markings (slurs, bowings, articulation markings, etc.)! Adding more tempo fluidity might help with phrasing as well...but I guess that's more of a subjective take.
I do agree with @Luis Hernández that the piece does get a little tiresome due to the homophonic nature. I think there are areas where some counterpoint/development would be beneficial (especially towards the end of the piece).