I think if you layered some of your instruments with some thicker/deeper tones, you might get a song that you feel is less "mediocre" sounding. Or try slightly more variation on some patterns, make the high pitched piano dance a little differently, although I really like the way it wobbles out into the background. I really love the rattly sound effects here, and I think over all the track is very solid.
I want to hear one that you don't think is mediocre though ;)