Leading a Warm Hand Over the Water - Euph Solo

https://youtu.be/CYEwDyBiZvIA euphonium solo with piano accompaniment for a student at my university who commissioned me to write some music for his junior recital. I appreciate all feedback.

Aren't the phrases too long? In some parts the piano could be more elaborated.

The melody is nice.

Just a question. can the euphonium play glissando downwards?