I figured that's what they were, but generally Mac apps will restore to their original size after you click "maximize" the second time. I'm using Windows right now and Maximize didn't restore on the second click.
Also, noticing in Clojure it doesn't keep your parens in order, is that something you see being done in modules?
Overall, I really enjoy it though. Going to take a little break from Emacs and give this a go.
As someone who is red-green colorblind, I cannot tell the difference between the middle and right circles when I mouseover them. And the leftmost circle is green to me (I have a feeling that it should be red)