Groupon is offering $5 off your next purchase when you play the "Find the Cat" game! To play, just head over here and log into your Facebook account. Click around on the Groupon deal pictures until you find the green holiday cat. Once found, you will be able to claim your free $5 coupon. Your coupon will be automatically loaded to your Groupon account after you click the "give me" link and log into Groupon. Your $5 coupon will only be valid through December 5th!