Fitting a camera for surface gui

Hello. I’ve been working on a game for several weeks. I have a main menu (made with surface guis) and depending on the screen ration, certain parts of buttons will get blocked out. If you don’t understand what I mean, you can check it out in the link above. I’m not sure how to fit the camera based on the user’s screen aspect ratio. Thank you in advance. Please tell me if you need more information!

Game link: Lights Out - Roblox