Make an update to WA 16:9
I don't know if this is only me, but when I play WA in 1920x1080, it's like 720x480, and black screen on the sides.
Fehér Márton commented
It happpens when you play worms on laptop.
Try different graphical engines and/or resoulutions under the settings ->Advanced
It will only work when you restart the game and go into a game