A tomcat called Mr. Bones wants to marry Ms. Felicity, the neighbor's cat. Larry, Mr. Bones' owner, must collect enough money to pay for the expenses of the marriage.
House of Wonders: Kitty Kat Wedding is a hidden object game with several mini-games. The main objective is to win money for the cat's marriage, by solving the 18 rooms in Larry's house. Most of them are variants of the seek-and-find gameplay, where a list of objects, that must be found and clicked on the screen within a time limit, appears at the top. Some rooms are upside-down, while some have all the lights turned off, with only a flashlight spot illuminating part of the screen.
Other rooms have mini-games, like concentration, spot-the-differences and other standard variations. At the end of each stage, the player can gamble the money on the spinning wheel. Items, avenues and transportation for the marriage can be acquired on the Wedding Mart, where everything is organized by categories. The wedding avenue shows the items bought by placing them on several related static screens.
Five hints are available at the beginning of each stage. When clicked, the hint button springs a wooden arm pointing towards one of the required objects. Wrong clicks deduct 30 seconds from the timer.