PAN Vision says Pirates vs Ninjas vs Zombies vs Pandas (http://www.pvnvzvp.com) is available at the Mac App Store in the Games category. It requires Mac OS X 10.6 or later and costs US$0.99.

Here’s how the game is described: “Pirates vs Ninjas vs Zombies vs Pandas is an addictive new physics-based puzzle game. Players take control of the four factions, each launching their minions as projectiles at opposing armies.”