In Games

How do you play the game on your computer?

FCE Ultra is one that has the option to use the mouse as a zapper. It's no substitution for an actual zapper though, seeming as you simply click on whatever you want to shoot.

the Zapper is awesome and so is the Zapper thing for the Sega master System

It probably does, it's like paying one of those advertisement "Shoot the duck and win a PSP" things.