Combine the graham cracker crumbs and melted butter. Press firmly and evenly into the bottom of a 9-by-13-inch dish.
Beat the softened cream cheese and confectioners sugar with an electric mixer until smooth. Spread gently over the graham cracker crust.
Arrange the drained crushed pineapple over the cream cheese layer. Add an even layer of sliced bananas, followed by the sliced strawberries.
Spread the thawed whipped topping over the fruit. Garnish with maraschino cherries and chopped walnuts.
Cover and refrigerate for at least 2 hours, until well chilled and set. Slice into squares and serve cold.