@santi6291 opened an issue (#21) informing me that the helper classes could collide with other libraries, and suggested adding an SCSS variable to prefix the helper classes.
This was implemented through the $helper-prefix variable, which by default is set to "", so that the helper classes stay the same. Setting this to "waffle-" for example, would make the helper classes as follow: .waffle-center, .waffle-m-hide, etc...