The game's protagonist (at least I assume so) is a boy's shadow. At the top of a tall tower, the boy's shadow is severed from his body and then dropped down to the bottom of the tower. The boy then has to climb up to the top of the tower to retrieve his body. The boy can only interact with the shadows though. The entire part of the game that I have played has been entirely in the background of the environment. It's a fairly interesting mechanic.
The game is fairly simple. The player goes through each level searching for 3 locks. Along the way, they must avoid or fight the shadow monsters as well as avoid the tower's defenses. At times, the player is given the ability to manipulate the shadows by adjusting the angle of the light or moving 'real world' objects.
The game is rated E (10+). The game is probably appropriate for children of that age (who would probably find the puzzles more challenging than I did). I would give the game a B rating.