SIMPLE LANG PERO ROCK
Even with the fancier graphics of other games for the iPhone, this is the one game I keep coming back to. Play and you'll know why.
From the iTunes app store description:
Unblock Me FREE is a simple and addictive puzzle game inspired by Nob Yoshigahara. The goal is to get the red block out of the board by sliding the other blocks out of the way. Unblock Me FREE comes with 400 unique puzzles pack in the Beginner level. Plus 200 unique puzzles in the now included Intermediate level as of last update
Hours of playing pleasure even as the higher levels become increasingly challenging. If you have an iPhone or iPod Touch and are big on puzzle games, this is a must-have. Okay, just one more level...just one more level.