So every pixel on your screen was equal to one pixel in the game? It should automatically set itself to 2 pixels on the screen to 1 pixel in game when you full screen.
In fullscreen it looks exactly the same, only the black border is even greater. If it helps, I'm using a Firefox browser with Windows 10, hardware acceleration on, opengl rendering. The game reports nothing unusual. If you are using Godot 4.3, try disabling SharedArrayBufferSupport, it may help!
Does Godot 4.3 not need SharedArrayBufferSupport anymore? And yeah, that would explain the problem, the game is supposed to be double the size on the screen as that, but it's not for some reason.
Oh alright, just disabled it then. I guess I'll add in a separate warning just in case for people to download the game if they full screen problems. Thanks!