Please stop embedding files/images from Discord. Discord has anti-hotlinking logic in place that breaks links to Discord hosted files and images when linked to from anywhere outside of Discord. There are a multitude of file/image hosting sites you can use instead.
(more info here)
However, I do think it's mostly unwarranted. I love playing mods at fullscreen myself, and I know there are plenty of people on this forum who do as well. It kinda sucks how there's a negative stigma attached to full screen Cave Story.