Title says it all my friend...there is more but let's start with that.
Not all classical music is loud and dynamic. Much early classical was quiet and soft with one instrument in the melody. That music also contained few dynamic changes. If I am not correct on that, please correct me.
I could try making a variation where it goes into a stronger and faster theme with a large dynamic change, but I would have to call it a new arrangement. I'll try that out and try to post what I make in a few days. Thanks for your feedback.