I tried to install the script as an admin user on the computer. This is basically to avoid that the current user, as administrator, and as 14 old kid, has the temptation to interfere with the script :)
Unfortunately, when installed as a different user, it seems that neither the "say" command, or the alert, or the osascript for the notification, works for the logged in user.
I tried to debug the script, but it is difficult to debug it as a different user. The notifications, when on the current user, work well.
Any suggestion?