Online Games that are Good?

Online Games that are Good?

Today i would like talk about online games are good for us? 

in my opinion, game is good for our brain and educations.
for example, TETRIS is good for brain. this game can be train our brains.
but a few games are not good for education. it has violent scenes. 
so i can't say that all games are good for education.
and
Today i would like to review free online game.
the title is shoot. this game can be improve our reflexes
this is link
http://www.albinoblacksheep.com/flash/shoot

this is very difficult but fun! please try it!!
game can be learn or improve your skills while you play that.