Thanks for asking.
Speed: I checked your website and tested the speed on GTmetrix and the page load time is around 11sec. I am sharing link:
In the test result you will see recommendations, please consider them as that will help to optimize the page load time. One of the suggestion is to optimize images. I suggest you to resize the images and then upload the same on the server. Here's a tutorial on how you can use GTmetrix and the suggestions.
I am also sharing our performance optimization guide that you can take a look.
Mobile menu: Mobile menu is not working because you are using old version of X Theme 5.1.0. As you are using updated version of Cornerstone 3.2.5, please update X Theme to avoid compatibility issues.
To update X Theme please take a look at following resources:
Version compatibility guide: To learn about the latest and compatible versions of bundled and supported plugins, please take a look at following doc:
2. Theme Update guide: Please take a look at following article to update X Theme.
3. Please take a look at following doc about changelog: