Tree UI Prototype

Last one I promise. I decided to continue playing with this idea, and furthermore make a workable prototype in the browser to see how it felt to actually use. To me, the lines offer a nice visual distinction of what level i'm on, especially with long trees (25+ nodes).

Check out the live prototype here: http://bit.ly/1mTJiim

Thoughts?

(The code is messy, no judging please)