While surfing the web for gaming info, I stumbled upon "How Did the Duck Hunt Gun Work?", a blogpost/article from Jan 2011. That article alone made the geek in me smile with
And a little more research reveals that Seeburg sold conversion kits with different scenery and animals; bear, deer, raccoon, and rabbit. Later models included more mundane cans on a fence (why shoot cans at home when you can show off to your buddies in a bar!) and, sigh, people (a classic gangster shootout, a chicken thief, and convict escaping from a chain gang). There's even a custom one called "Shoot the Bartender." Not sure I'd want that game in my bar.
PONG on your oscilloscope? Check. And now, from the Great Depression, optical shooting galleries. Gaming + tech = awesome in any time period!