Rating issues
Violence is mainly caused by other objects falling on you or squashing you. A variety of deliberate environmental hazards are featured in most levels (e.g. static spiked objects, falling blocks, etc.) When the main character dies, he will disintegrate into geometric shapes.
Other issues
From time to time the game features a creepy or mysterious atmosphere, especially in many of the cut scenes. The themes and depictions in the game may be frightening or scary to young children.