From Webkinz Insider Wiki
Flip over and match the cards before time runs out. It is basically a timed matching card game.
The only control you need for this game is your mouse.
There is no trophy available for this game.
Matching the card with Wacky on it gives you either extra points or more time.
According to the the WI High Score Board, the highest score achieved by a WebkinzInsider member in Where's Wacky is 26,937 by member mombraun.