The game is won when one player all of one player's catapult movers have been destroyed. A catapult mover is destroyed by either being
- hit with a cow
There are three types of cow, a standard cow which destroys one catapult mover per hit, a glass cow which destroys two, and a metal cow which destroys three.
- driven a catapult into cactus, fire, or rabid dogs
- burned by Mr Sun, or
- eaten by the Hungry Hungry Weasel Head
If both players catapult a cow and they collide then this triggers a game of cow boxing where the two cows fight on a cloud. The losing cow dies and the winning cow survives.
The game has four arenas;
- the Volcano which features random outbreaks of flame,
- the junkyard which has rabid dogs,
- A Metropolis which is Agra in 2069 and features more frequent fires, and
- the Chasm which features fast growing cacti.