While using the mobile version of the site - the side menu is of course a necessity. Problem is, at least for my Android phone, that when you expand one of the menus into its sub-menus, causing the menu to collapse back requires you to hit the main "side menu" button. This may seem like a personal inconvenience but it was very unintuitive for me, and I'm sure to many others as well.

Personally, I think adding the option of closing the sub-menus back by clicking the little arrow thing (or just adding a small button next to the text instead) would be great.

P.S. Love what you are doing with the site! keep up the amazing work!!!