I don’t usually recommend iPhone games here, but I stumbled upon Hook Champ a week ago and i’ve been ‘hooked’ since. It’s a speedy platform, jumping/swinging game with a classic 8-bit retro style. Its highly addictive and great fun in vs. mode, trying to outpace your competitor to the finish. Playing takes me on a nostalgic trip back to the excellent Rick Dangerous series on the Amiga.
I’ve also been reading the dev blog for The Incident another retro styled iPhone game due for release soon. It’s interesting to see how the developer (Matt Comi) approaches different aspects of the game on the iPhone SDK.