I know there is a print picture somewhere, but don't think there are any here as DD has nearly all of the family photo albums at her house across the state. A couple of years we had Halloween parties for her and her friends when they were in their preteens to early teens, so more than 25 years ago. I made cupcakes for them and decorated as follows. I'll see if she feels like looking for the photos.
Pumpkin patch, using the little pumpkins made out of the candy corn stuff, green frosting grass using the hair/grass decorating tip.
Pumpkin, orange frosting, candy corn to make the eyes, nose, and teeth, black gel icing to outline the mouth.
Ghosts, dark blue or colored black chocolate frosting. Ghosts made out of melted white chocolate and cut out while cool enough to form shape, but not cool enough to crack while cutting. I stood the ghosts upright.
Night sky, Dark blue frosting, moon out of melted white chocolate, stars out of slightly tinted yellow white chocolate, though I might use sugar or isomalt for the stars now. I'd definitely use some luster dust for the stars though regardless.
Black cat, green grass frosting, chocolate cat or decorated cookie with an arched back standing up. You could also throw a pumpkin or 2 depending on size of cat you make, or maybe some bone shapes either piped or cut out of white chocolate. Maybe a tombstone.
Spider, green grass frosting. I piped a body, added red eyes, and piped chocolate for legs so they'd stand up. You could also use the Royal icing for this, though now I'd probably use melted, dyed black sugar or isomalt for the legs now, or maybe modeling chocolate.
I did a witch on a broom with a moon too, but I don't remember whether I used a template to pipe or cut her out of chocolate, but either would work.
You could also use Royal icing instead of chocolate for any of the ones I mentioned using chocolate.
They make a lot more candies now that could be used for decorating than they did when DD was a teen, eyeballs, bugs, etc.