Besides of the four long game worlds and beginner scenarios AirwaySim has also frequent shorter "challenges" that are always build with some theme in mind. These shorter scenarios are ideal for people who cannot commit to a year-long simulation but still like more variation and difficulty than in the very easy Beginner's World games. The current 1980s Challenge will end soon and now it's time to cast your vote and let us know what type of scenario we should set up next. So head over to our forums and vote & comment.