Played with my wife... fun, but anything other than first to shoot? There are ways of complexifying that could be fun ;)
A downloadable game for Windows and macOS
This was made in 9 hours ( out of a possible 48 ) for Ludum Dare 36.
Gameplay is going to be tweaked to better enable the players to ram each other, and have better control of their stones.
*I'll be picking this up and adding controller support, alongside mute, exit and replay buttons.
This version has a quick restart function, audio toggle, improved controls of catapults and better physics in general. I've also thrown in confetti and flags, enjoy!
Just download and run!