No way is Halloween an American invention.
It is the end of the summer festival of Samhain a delightful pagan festival (as is Christmas which celebrates the birth of the sun).
In my youth it was celebrated by gatherings where traditionally there would be games involving dooking for apples where you had to get your reward by removing the apple from a basin of water with your hands held behind your back. A suspended treacle scone had to be eaten, again with your hands behind your back etc.
Children, in home made fancy dress, would visit neighbours and friends to perform their “party piece” of a song, poem, dance, gymnastic performance, or recitation for which they would be rewarded by a handful of nuts, some fruit or homemade goodies such as tablet or toffee.
This celebration made its way across the Atlantic where it mutated and unfortunately returned, much altered, in relatively recent times.