Awesome. Thanks! Level 8 is killing me. I also feel like I need to find a topology site and review the basics. I haven't had this stuff in a bazillion years, and then only superficially. You don't need to know topology to solve this, but it might give some interesting insights, like should you start with the vertices that have the most edges...
 

He's added some new features to the game since you first posted about it. Check it out.