You can set a check under "Embed Options" -> "Frame Options" -> "Fullscreen button" that will allow you to see the game in full screen.
I would do this now but were about 30 minutes too late haha but THANK YOU OH MY GOD. I WILL TRY THIS NEXT TIME...
Only the files should be locked. This is a itch.io setting, maybe you are still able to change it.
