Prepare and bake cake mix according to package directions for cupcakes; cool completely.
For tombstones, in the microwave, melt chocolate chips. Pipe "RIP" onto cookies; place on waxed paper to dry.
Frost cupcakes; sprinkle with chocolate wafer crumbs. Carefully insert tombstones into cupcakes. Arrange chow mein noodles to resemble fingers. Use gumdrops to make pumpkins; place in front of tombstones.