Probably your best
As it had "sorry" in its name I thought it was going to be something pretty depressing. It actually turned out to be one of the most light hearted songs I have heard in a long time. It doesn't make you feel sad or anything, it just makes you feel good. I imagine you could play this in the room of a sleeping infant to help it be at peace with itself. It seemed like this was mostly done with the piano. I used to play it, so I would be familiar with it.
Do not be so hard on yourself because you simply want to submit what you enjoyed working on. It certainly paid off as the ratings are fairly high. I love the little notes that dwindle on contributing to its soft appearance. It seems as though you are saying that you are slipping off to sleep. If that's what makes this great music, then by all means, do it!