Place 3 tablespoons of the frosting in small bowl; set aside. Stir orange food color into remaining frosting in container until well blended and no streaks remain. Frost cupcakes.
To make Spider Web Cupcakes, use black decorating gel to draw spiral covering on top of each frosted cupcake. Drag toothpick through spiral from center out, creating a web. Press 1 spider ring onto each "web."
To make Eyeball Cupcakes, drop 1/2 teaspoon vanilla frosting from small bowl onto each frosted cupcake. Lightly press 1 candy-coated chocolate piece in center of each. Use black decorating gel for pupil and red decorating gel to draw red squiggly veins radiating around edge of white frosting.
To make Grave Cupcakes, write "epitaphs" on one end of each cookie using black decorating gel. Press cookies into cupcakes to form "gravestones." Sprinkle cookie crumbs around each "gravestone"; add candy pumpkin to one side.