On: For the game designers and players: this is the best list of well-designed flash games

[fallintothis]

Actually, that's the one I play most often, too. (For some definition of "often"; I don't play games much.)

A couple other good ones I've played are http://www.ferryhalim.com/orisinal/g3/bauns.htm and http://www.ferryhalim.com/orisinal/g3/bells.htm (apropos of winter time). Honestly, most of them are really worthwhile.