Hmmmmmm....
While it's not bad, there is not much to differentiate it from similar works. The left hand plays eight-note triplets, while the right hand a simple accompaniment melody. It works for what it's going for, but this sounds an awful lot like other such songs, so it hurts in mostly the originality department, where I can say "Oh, THIS guy wrote this song, no doubt in my mind!"
Don't think I think your song sucks; it doesn't, and it's soothing, etc etc etc. However, it seems you yourself says that this is not your best effort, and I can kinda tell without listening to your other stuff. I don't want to say "don't settle for second best!!" because I do that all the time too, but just make sure you're aware of it.