Free Sliding puzzle is a game with a turtle that you feed by solving puzzles.
The two game modes are Story and Arcade.
In Story mode, there are several levels of different complexities. When the turtle loses energy it restores it by eating fruit. The more energy it has, the more happy it is. The level is complete when the turtle is happy.
In Arcade mode, there are many more levels. There's also an editor for cards and levels. You can easily share a level you designed using its alphabetic code.