The 4K Game With No Name

My entry into the the Java4K 2011 competition. A homage to the wonderfully addictive Plants vs Zombies game from PopCap. This is a work-in-progress, and currently weighs in at 3842 bytes, quite close to the limit of 4096 bytes. The source code is available here.

Instructions: hover the mouse cursor over an empty cell, and then left-click to place a green Shooter, or right-click to place a white Mine. The blue Enemy units approach from the right. Shooters will kill Enemy units after many shots. Mines generate Money, but explode on contact with an Enemy, killing both.