Like DSound said, its a nice melody! But it felt to me you could have some rests in the main parts, or move the melody to another instrument at some point, since as is the cello just keeps playing without a rest it gets a bit taxing to listen in the long run.
The musescore sounds dont really do this justice, but is sure if this was played live it would sound/feel a lot different (in a good way😀)
Nice one!