This is pretty nice. While you played with the melody, you didn't stray too far from it and produced something quite uniform.
The feeling I gather from this is one of going against a set boundary to do what's needed. Although it's beneficial in the long run, I notice a small trace of regret or some similar feeling. (Maybe a little bit of fun was had along the way as well.)
I'm quite found of the end in particular. Songs that have a bit of an "afterthought" near the closing are my favorite because they serve to summarize the song and leave the listener with something to process. This piece was no exception. I like it.