Do you want to participate in some research? Please?
It's simple. Go to this address, play two levels of Super Mario Bros, and answer some questions about them. (Actually, it's not the "real" Super Mario game, but a customized version with some differences - you'll see!)
It's all part of a project that I'm involved in together with Chris Pedersen and Georgios Yannakakis at ITU. We're trying to investigate certain factors that affect entertainment in platform games and how to automatically optimize levels in such games. You'll hear about the results soon enough...
So, please play a game and contribute to science!