FWIW Bejeweled [Blitz] requires skill. I'm moderately good, second in my circle of friends and I go off the boil if I've not played it for a while, it takes time to get back into the groove. That said they do manipulate the scoring a lot and there is a lot of pressure to buy, buy, buy to get a higher score (that I've resisted, that's not my thing).

Bejeweled is a very well constructed Skinner Box that has been effectively optimised over time. TBH it should be part of a course on addiction psychology, it probably is.

Interesting comments nonetheless. Thanks for sharing.