Flipz is a puzzle game for iOS where you put patterns on a grid to flip tiles. Includes lots of game mechanics (multi-flip, rotating patterns, time-blocked), a multi-player mode, 100 hand-crafted levels, tutorials, an automatic level generator, and a level editor.
Here's the official homepage: Flipz
Just open the XCode project. No external dependencies.
GPLv3. If you'd like to use some parts (or all) of it for some commercial project, please just ask. With the GPLv3, I just want to avoid that the game suddenly appears in 20 reskinned versions in the store, giving the original one a bad name.