Thanks for checking our game out! While we have keyboard support, the game is best experienced with an xbox 360 wired controller for the player who is playing as the antivirus. It should still work if you have the game in fullscreen mode, but I'm sorry that you're having issues with it. Downloading the game might also fix your issue if you have the space to download it. This game was done as a student project so we don't update it very much, but if we do we'll try to fix the issue that you're having, I'm sorry about that!
-Nathaniel Dalton