Prismaze

Hello, I am finishing a website, and I am having a similar problem. Below 1500px my menu is on 2 lines. Do you have a code to avoid this problem? Maybe we should go from a computer menu to a phone menu when viewing the site below 1500px what do you think? Thank you for your help, attached the screenshots, the website link: https://elenadellutri.squarespace.com/ password: 5636