My Game isn't working

The Multiplayer isn’t working that well at all @grazer can you help?
My Game:

Hey Johnny Boy - do you have any specific complaints with the multiplayer? The multiplayer does have some known issues remaining, but I’m probably not going to be able to address them until after the HTML5 update is released.

yes when I shoot the other player it takes a life a way from me not them

I just fixed it but now there’s another problem when one person gets a gun it gives the other person a gun also.