Looking for some simple Cocoa games that would be easy to port to the iPhone? Look no further. Here are a few quickly written games (source is in src directory, duh) that could be easily ported by changing a few details (NSRects and IBActions, etc.). Games include Pong, Tron (single player, sorry), Breakout, and Snake. Each game has a few minor bugs (collision in Pong, adding segment glitch in Snake), but nothing big. Maybe a few more later.
What are you waiting for then? Download.