If you haven't already downloaded it, there should be a 1.1MB update waiting for you.
This addresses an issue where the game would leave fullscreen mode whenever returning to the main menu from a match.
For a more exhaustive list of recent changes in the previous update you can read those patch notes here.
If you encounter any other issues please post them (and as much detail or screenshots/video as possible) in the Technical Issues forum.
I hope you're enjoying the game so far, and we've got some more stuff coming up fast that should help new players out a bit. ː60sFirstAidː