In the License section I write this text - "Public domain, see the LICENCE file.", and in the text of the license itself the word "unlicense" is also nowhere used.
In my country you cannot dedicate something to the public domain (it happens automatically 70 years after your death).
The Unlicense would most likely allow you or your heirs to come after me and sue me for copyright infringement for many decades.
If you (pretty much) only want US citizens (or naive people) to use your code that's fine. However given that you choose this license it seems like this wasn't your intention..