Catch Fullscreen, menu problem when scrolling

Hi, i'm testing on a website with the Catch Fullscreen Free template and have a problem with the menu when scrolling. When you scroll down the menu overlaps with some content (the titles stay hidden behind the menu) on the different sections and you can't see all the in a proper way. Is there anything I can do to solve this? The URL is: http://www.newsite.snail.studio/ Thanks, Matias Rodriguez