Bright and emotionally expressed
This piece is full of melodic sounds. It is really touching when you have one instrument such as piano which has the greatest sound range, compared to other instruments, shows off its sensitivity alone. I like the chord you use (Bb, is it?). Though it's repetitive for 5 min song, it's lingering in listener's head for such a long time.
Accompaniment from strings and woodwinds can bring this piece even more dramatic.