I don't think it's the cute visuals. I have struggled with compulsive gambling for over 15 years. I normally hate casual games, but immediately had the same addiction to Angry Birds that I do to gambling (which is good because it costs less :) ). The same thing occurred with Tiny Wings. In fact, I've been able to predict both the rise and fall of several game titles just based on my initial reaction to the game. I guess I am hyper-sensitive to any addicting elements that exist.
Anyway, if you want to design an addictive game, look at the characteristics of casino games and design games around those. Maybe all game companies should take copies of their games to Gambler's Anonymous meetings for vetting :).
Anyway, if you want to design an addictive game, look at the characteristics of casino games and design games around those. Maybe all game companies should take copies of their games to Gambler's Anonymous meetings for vetting :).