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Quick! The penguin population is being devoured by the foxes! You have only one weapon -- an unlimited supply of bouncy balls. Try to save as many penguins as you can.
Use WASD to move, mouse to look, space to fire. Press escape to get your mouse back and pause the game.
This is an demo program using the Env3D engine (http://env3d.org) -- a 3D engine designed to make learning Java programming fun and exciting. The entire game is less than 500 lines of code.