Bullet points in mobile menu

Hi

On completion of a website I have a problem with the mobile menu on the home page. I used this code in my stylesheet:

.page-id-2
ul {
list-style-image: url(‘https://parnhamcarpentry.co.uk/wp-content/uploads/2015/05/green_tick-300×300.png’);
}

(id-2 being the homepage)

To apply to bullet points on the home page only (making them green ticks) but for some reason they are also showing in the menu on a mobile device. I don’t see why this is the case as there do not appear to be bullet points in the menu on other pages.

The site is: https://parnhamcarpentry.co.uk/

I hope I have provided enough information.

Thanks