This week on Casual Friday, we'll take a look at several games, all in the same genre.  Each of these games are for the Wii; Nintendo's console is a fine choice for casual gaming, though certainly not the only option.  The unique capabilities of the Wii remote have led to something of a renaissance in an old, but dearly beloved game type: the lightgun shooter.  We'll look at several examples of Wiimote shooters today in our quest for the best co-op title in the lot. One of the first things a non-gamer will say when you hand them an Xbox 360 or PS3 controller is "what do all these buttons do?"  It can be overwhelming to say the least.  Consider the Wiimote, though.  The pointer motion is quite natural, and easy to understand.  There are lots of buttons, yes, but A and B are much larger and more prominent in a tactile way.  The device is a perfect fit for the simple point and shoot philosophy of lightgun games, and Nintendo obviously knows this.