We seriously can learn a lot about how dynamics can create something so expressive after listening to this. I really like how a solo cello sounds, and this is a good example of how instrumentation can be used to create a specific mood. In this case, a mood of restlessness or unease. I'm not sure how you managed to get this clarinet to sound so expressive, but it must have taken a bit of tweaking. I love your motive, using the triplets to create a fun and playful rhythm (but in a dark sense)