You can play the original version here: https://www.newgrounds.com/portal/view/936094
the music and sound volume are set to 0 by default (You can change them in the in-game settings)
Changes to the original C.A.T.S. For Scratch:
The Medals are replaced with the ranking system
Added Lasers
added the Reset Game Button
Added Gems (Use These If You Don't Have Enough Coins To Upgrade Your Weapons), You Can Get These By Winning Quick Fights (3 wins each give you more gems (gem reward = wins/3))
Better Mobile Compatibility