How do I "fullscreen"? There's no icon in the lower-right like for Unity or Godot, and there's no 'settings' menu.
We are having technical issues with the full screen feature. We will work on that. In the meantime, If you want the full experience, there are zip files for windows and Mac!
Issue is resolved!
It sometimes enters to an endless loading screen when changing to fullscreen mid game.
Try clicking on the screen if it happens