I installed the plugin and added a slider in the home page. It looks well in a PC screen, but it looks it's not responsive in a mobile screen. The slider shows small, and does not cover all the screen, as in a PC browser.
As I can see, currently you are using a fullwidth layout, this will stretch the slider's size to always fill the available width of the browser but not the height. If you would like the slider to also cover the height on all resolutions, I'd recommend to use the fullsized layout instead.