Currently we're having issues with the fullscreen on itch.io :(
You can also play Speed Squared on GX Games, and here the full screen mode should work on their website. https://gx.games/games/vb9rtu/speed-squared/Let me know if it works for you!
Fullscreen works on GX games just fine
Nice 👍 It seems to be an issue with how itch displays the game /:
