This piece is very classical, it strongly reminds me of Mozart, however I don't understand if it's for an orchestra or just for a cello + few other instruments of contour, the cello surprises me when it came up, even if it's the at the beginning of the piece. I advise you to present the main instrument at first and then instorude other secondary instrument, or at least to write a longer introduction so it's clear the main character will come later. I also think you can express at the maximum of your potential if you experiment more if you add the dynamics (pp, p, mf, f, ff).