Quoted from drfrightner:
Octoberfest is the most confusing theme I've ever seen... at first glance it looks like a BEER theme, but no wait its a carnival, its a party, no wait its I have no clue. Who would drink beer and ride a roller coaster?
Ummmm... the theme is Oktoberfest. Of course that includes beer, and there's plenty of beer in the game, but it's so much more than that. Yes, rides, games, partying, food, music.
This is Oktoberfest: <
(Simply the first hit I got searching YouTube for "Oktoberfest"; feel free to browse the infinite stream of results.) Believe it or not, it's not just oompah music... for whatever weird reason, "Sweet Caroline" is a super popular song there. So are many other pop, rock, and even country songs, both German and American. And keep watching to 8:24 or so to see what kind of carnival it really is.
Really, we didn't just make up a bunch of stuff out of thin air to fill the game. We tried to be faithful to the theme. Even the ducks are absolutely an Oktoberfest tradition.
The original Oktoberfest in Munich Germany is 200 years old and pulls in several million people each year. There are hundreds if not thousands of derivative festivals around the world each year. It's all pretty damn popular and fun.