Grab the Plutonium Disk with your mouse and carry it closer to Scratch Cat, the closer it is to Scratch Cat the more radiation he gets exposed too and the faster mutations can happen. You have also been supplied with Anti-Radiation "Capsules" to make Scratch cat take to remove all current mutations he has. Press S to show debug stats and H to hide debug stats Also don't worry about Scratch cat... he'll be fine! If you expose Scratch cat to enough radiation Scratch Cat will eventually do mitosis
Grabbed the Geiger sound effect from a Geiger Simulator game on Scratch. That's it really Cat... and mutations... but instead of Eugenics... it's radiation... plutonium 240... 10000 Rontgen of radiation...