First of all congratulations to the osclasspoint team for the theme, it is one of the best I have seen!

My question is, is it possible to make the mobile menu go out on the left instead of on the right?
I would like it better, it would look more "pro"

As icon is on right side, it does not make sense to show menu on left side. If icon is on left side, it does not make sense to show menu on right side. At the end menu is full-width so there is no left or right orientation.