My friend's physical card game, Kingdom Conqueror, p2p!
You have to download and run AutoHotkey to run this script, but this can be done w/o admin.
Once you have downloaded and extracted, simply run KCgame.ahk, and follow the in-game instructions. There is a link to KingdomConquerors.com in game, which demonstrates how to play.
You may have to port forward as the host, if you are not connecting on the same network. (Most ISPs will have an easier way through their app or something)
Please be delicate! For best gameplay experience don't do anything! It will break without warning or error!
If this happens, you can try to restart by pressing esc and returning to menu.
If it ever does have an error, relaunching the script or selecting Reload from the error menu should do the trick.
There is also a card creator mini-app, but it is not fully implemented, you can use it to create cards visually, but it will not show up in game.