Marbelous

The game's objective is to guide a small sphere across small pseudo-3D platform levels. The sphere is trapped in game zones, and  must change a set of block's colors inside that zone to transform  itself in water, fire and iron and pass the obstacles that do not allow it to advance in the level. The sphere is controlled by tilting the mobile phone. A small control adapter (containing reference points and a small red sphere) is fitted on the phone's camera and provides the game engine (via real- time image processing) the actual phone's tilt angle.