How to make WP Spry menu plugin work with responsive.css for mobile

Hi Takien,

You did a very nice job with this plug in but i want to know how to make WP Spry menu plugin work with responsive.css for mobile. because then is it unvisible.

i hope you help me out.
Test website i am working on is https://islam.kulpito.com/

Thnx for your time. gr.

https://www.ads-software.com/plugins/wp-spry-menu/