WaTor World X 0.3

WaTor World X is a Mac OS X version of the predator-prey type simulation originally described in Scientific American by A.K. Dewdney. Sharks eat fish, fish eat algae, and algae grows on empty space. Fish and sharks die and breed after a specified number of generations. The parameters can be dynamically changed during the simulation.
This is my first Cocoa application, so it's possible there's memory leaks or other problems. Constructive criticism is appreciated.
What's new in this version:
Version 0.3 (5/1/2004) Mac OS X 10.2 compatibility
Version 0.2 (3/29/2004) Added dynamic sliders Added automatic stopping after the word has been overtaken by algae Fixed statistics sliders, no longer allows dragging Fixed Reset button functionality Improved speed
Version 0.1 (3/28/2004) Initial Release