Join Greco and Beco as they find their way around three mazes while getting rid of environmentally hazardous "building monsters"! Answer the questions when you reach a BCA Green Mark bubble for bonus points and a special power! The faster you gobble the dots and clear the mazes, the higher your score and the better your chances of winning an iPad 2!

Contest closes 4 August 2011, 2359 hours (GMT +8)