I like the Find the Bats Idea Fun Halloween Game Ideas.donut game is cute and choosing a word that's off limit is fun, adult version could be to take a drink every time you get caught saying the word :)
Jello Worms - Tie a bunch of straws together. pur gelatin into straws. let it sit over night in the fridge. take the straws and let gelatin slide out AND THERE YOU GO! You have jello worms! How to Eat Fried Worms. (Maybe jello shot worms.
Halloween Game for the kiddos!* Eyeballs: peeled grapes or olives * Tongue: banana peel or canned green chili (whole) * Intestines: spaghetti (with a splash of vegetable oil to keep them flexible) * Teeth: candy corn, corn nuts or broken pieces of chalk