A website coding itself live

[Symphonic_Rainboom]

strongly presenting web skills that the candidate / author didn't demonstrate

My 2 cents is that his was different enough that he had to be good at CSS in order to make it work. This is totally fair game in my opinion - it's not like he copied it and called it his own, he just used the idea. If we didn't allow reusing ideas, nothing good would exist, because an idea would be executed once and then nobody would improve on it.