Ika Musume is fun because it's pretty much story less, cute a lot, and playful.
If there was a game based on it, it would have to be online freaking out doing just about every fun thing a kid her age would like to do, with the addition to having 10 tentacles, and no basic idea about mankind and learning stuff superfast.
There is a lot of screenshot material this season, more Mini Ika Musume (and likely more in the BDs)
I dunno, every time I see Ika Musume I smile, this season is as good as the previous because there pretty much is no way of making it bad ... Seriously, they would have to work really hard to make it bad. It's of those really hard to screw up things in the world.

And
It's fun
