image+description slider not working, know how to fix?

i have a menu in my website and what i want to happen is when i push the “game” button is for the slider to appear (not on the menu though, on the.. the screen thaat is there before you push the menu button.but different, like when you have built-in tabs. ) so that brings me to the website,
[here’s my code, remix and use the next link.][1]

alright, this is the slider i want, but that is messing up my website:
[slider][2]

what it looks like when i add it to the site and select it and have menu open:
[selected and menu open(it shouldn’t be open in menu][3]

<div class=”slider-item-content”>
<h1>Postcards From Italy</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore</p>
</div>
</div>“`

[when menu is closed(as u can see it is also broken now. please fix it][4]

[1]: https://glitch.com/edit/#!/cbj-web
[2]: https://codepen.io/aybukeceylan/pen/yLaqqOL
[3]: https://i.stack.imgur.com/BWShi.jpg
[4]: https://i.stack.imgur.com/lqe1r.jpg