First of all i wanna say i like the theme. I use it on my local server to try it but in web browser all seems fine while in mobile browser Chrome i get on one menu problem.
When i set main menu item without link just to be there submenu of that main menu item having problem get toggled down. It seems that when i click on main menu it does css animation and expand submenu but in same moment turn it back and collapse it. That makes animation impossible to use submenu. But if i tap and hold that main menu item it animate normal and submenu stays open.