I personally enjoy
http://www.eyezmaze.com/ Not much replay value, but the stuff there is cute and nifty~ ^_^
I personally find escape room games nifty too... Unless they have creepy things in it, then I get kinda freaked out. @_@
I'm currently in search of decent free, tycoon-style/sim game. @_@
The ones you have listed are pretty nifty though. : o I may try some when bored.