Happyland has been taken over by the evil Dr. Ronsvolt. The Smilies of Happyland have been turned homiciadal. With the fate of the Earth at steak, you must chase the smilies back to Happyland, infiltrate Ronsvolt's lab and kill Ronsvolt to break his telepathic control over the Smilies.
Five minutes after I made the Ronsvolt skin, volia! The entire cast (apart from the little smiley because he's incignificant).