i used ur idea of saving the variable that the game reads from in the share folder of a network. and took it a little further. i made one game save its actor (A) x and y possition and load actor (B) x and y
while another game was loading actor (A) x and y positon and saving (B). both games read from the same variable. i was opening one game on my computer and my friend was opening the other game on my laptop. and there u have it

a multiplayer game where u cant see the other screen

basically a game over the internet but only in your network. added a few guns and we was shooting at each other for a while.

i sujest if you guys have another computer at home u try making a game like this. very fun and somthing i hadnt done before