Gemlogic is a gem-based puzzle game, much like the one we all know. This one’s a little different though since all moves are allowed, and the difficulty lies in getting to the highest level without your life running out. The higher the level, the more difficult it becomes.

There are three difficulties, beginner, intermediate, and veteran, each offering a different sized board (5×5, 6×6, and 7×7 respectively). Also, the higher the difficulty the faster the life meter decreases.

Release notes:

This update was in response to numerous requests for allowing new themes. The app now checks to see if a new theme exists in ~/Media/Gemlogic/Themes/Default, and if so, loads that theme instead of the default one inside of application package. This is more ideal than people manually inserting new images into the package, since a new release would kill their theme.

http://www.spiffyware.net/iphone-gemlogic.php