Mobile Friendly Category Filter WooCommerce

We have a WooCommerce website and paid a developer on here to create a mobile friendly category filter.

This worked nicely, but then suddenly it has disappeared from the site (probably due to a theme update) and his PPH profile is no longer active. We did pay him in full for the work and it worked fine for several months.

I still have the demo he created here, although there is no styling applied, it is just the functional code: http://primedjobs.wpengine.com/demo/demo.html#

What I want is for somebody to re-add this mobile category filtering tool to our website. It is only for mobile users, so doesn't need to appear on desktop.

It works as a sliding selector - you select the top level, it swipes right to the next level (with a back button) - and allows you to proceed to the next level. It automatically pulls in our categories and also lands automatically on the sub filters when you're in a particular area. It needs to filter down through 5 levels.