Cover cakes with candy. Melt white, light cocoa and orange Candy Melts candy, separately, according to package directions. Use spatula and melted white, light cocoa or orange candy to swipe bottoms of cakes. Place cakes on parchment-covered cake board, candy side up. Chill until firm, about 5 to 10 minutes.
Place cakes, candy side down, on cooling grid over parchment-lined pan. Use melted candy in same color as bottom to cover pumpkins. Tap to smooth and remove excess candy. Use spatula to place cakes on parchment-covered cake board. Chill until firm, about 10 to 15 minutes.