Surely you have some old worthless amiga games you can give them?
If I get time to dig them out I might offer visitors c64 tapes.
Welcome to 1985, help yourselves!
I doubt kids these days will know what a cassette tape is never mind a c64.
As for me, our lights are off in the house (trick or treater repellent).
If you do answer the door anyone, ask them for a trick.