How do I Make two player touch controls Help!!

I can't figure out how to make a two player touch control system. Im trying to make a game that is a top-down shooter for two players. the players would be facing each other, and they would need to follow the touches. Please Help!!!

Thanks ahead of time

Well, you could make them unable to cross sides of the device, that way you can just measure if touch is greater or less than the midpoint. Otherwise, just compare distance from the object to the touchpoint (System>Compare two values) or pick the nearest player object to a touch instance--just remember, it'd be possible to steal a character this way.

How would I set the middle of the screen though?

WindowWidth/2

thanks