Opinions Please

From a listener's perspective:

I like the catchiness of the tune.

The first bars with both piano and strings are a tad muddied; hard to hear exactly what's going on.

I wouldn't have quite so much (stark) contrast between the times when the piano plays and when the strings play. You have times when they are together, but it's so abrupt when they're not. I'd add some sustained or long piano notes or something to break the stark either-or and to add tension.

Finally, measures 30:
The run in measure 30 with the 1st Vc playing C# doesn't work; it's too low and creates muddled uncertianty.
I'd rework it and create a bit more smoothness in the harmony towards the end.

Finally, why have the piano start at the end of measure 29 and then stop? How about having it hit a final note or two-note chord or something, participating to some extent. Again, it's too abrupt of a change in the texture.

Nice, otherwise.