The Difficulty Chart Virus Took Over all The World Now. Click the Virus to Save The Scratch Cat. Don't Get The Scratch Cat's Health go to 0 or else, He Will Die Now! Note: - Easy (Green) Virus is a Slow Virus to Attack - Medium (Yellow) Virus is a Normal Virus to Attack - Hard (Orange) Virus is a Slightly Fast Virus to Attack Large - Difficult (Red) Virus is a Slightly Fast Virus to Attack Very Large