Just a little something fun to try

[Techy-D]

This one doesn't require any thinking, just dexterity with a mouse(best I got was 17.47 sec)

http://members.iinet.net.au/~pontipak/redsquare.html

Kinda clever as well. I got 16sec after a few tries (Might try it again later). I still rather think hard than twich, flinch, and sweat.